U.S. patent application number 14/284634 was filed with the patent office on 2014-09-11 for system for improved tissue handling and in line analysis of the tissue.
This patent application is currently assigned to HOLOGIC, INC.. The applicant listed for this patent is HOLOGIC, INC.. Invention is credited to Kenneth F. DeFreitas, John LaViola, Ian Shaw.
Application Number | 20140257135 14/284634 |
Document ID | / |
Family ID | 46172228 |
Filed Date | 2014-09-11 |
United States Patent
Application |
20140257135 |
Kind Code |
A1 |
DeFreitas; Kenneth F. ; et
al. |
September 11, 2014 |
SYSTEM FOR IMPROVED TISSUE HANDLING AND IN LINE ANALYSIS OF THE
TISSUE
Abstract
A system for analysis of biopsy samples includes a tissue sample
transport mechanism linking a biopsy sample excision tool to a
tissue sample holder disposed in a staging area of an analysis
unit. The tissue sample is automatically transported from the
excision tool to the specimen holder, where the tissue sample is
analyzed in the staging area of the analysis unit. The transport
mechanism may include tubing and a vacuum source. The tissue sample
holder may be configured to slow or temporarily stop a tissue
sample for individual analysis, or collect multiple tissue samples
for analysis as a group. A tissue sample sorting mechanism may be
employed that allows separation of specimens that can be correlated
to the analysis.
Inventors: |
DeFreitas; Kenneth F.;
(Patterson, NY) ; Shaw; Ian; (Yorktown Heights,
NY) ; LaViola; John; (Orange, CT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HOLOGIC, INC. |
Bedford |
MA |
US |
|
|
Assignee: |
HOLOGIC, INC.
Bedford
MA
|
Family ID: |
46172228 |
Appl. No.: |
14/284634 |
Filed: |
May 22, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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13383318 |
Jan 10, 2012 |
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PCT/US11/62148 |
Nov 24, 2011 |
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14284634 |
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61417096 |
Nov 24, 2010 |
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Current U.S.
Class: |
600/566 |
Current CPC
Class: |
B01L 2200/0684 20130101;
B01L 2300/021 20130101; A61B 10/0096 20130101; B01L 2200/025
20130101; B01L 2300/025 20130101; B01L 2400/0605 20130101; B01L
2200/146 20130101; B01L 2200/026 20130101; B01L 2200/18 20130101;
B01L 2400/049 20130101; A61B 6/4405 20130101; A61B 10/0283
20130101; A61B 10/0275 20130101; B01L 2400/0478 20130101; B01L
2300/0681 20130101; B01L 3/502 20130101; B01L 2300/0672 20130101;
G01N 35/04 20130101; G01N 2035/0481 20130101; B01L 2400/0644
20130101 |
Class at
Publication: |
600/566 |
International
Class: |
A61B 10/02 20060101
A61B010/02 |
Claims
1. A method of controlling a biopsy device, the biopsy device
comprising a cutting cannula and an outer cannula, the outer
cannula defining a biopsy cutting window adjacent a closed distal
end thereof, an outer cannula lumen, an air vent port and a saline
vent port, the air vent port and the saline vent port being in
selective fluid communication with the outer cannula, the cutting
cannula defining an open distal end and a cutter lumen, the cutting
cannula being slideably disposed within the outer cannula, the
method comprising: applying vacuum through a proximal end of the
cutter lumen; retracting the cutting cannula proximally; drawing
saline into the outer cannula through the saline vent port while
the cutting cannula is retracted proximally; and drawing air into
the outer cannula through the air vent port after drawing saline
into the outer cannula through the saline vent port during the
retracting step.
2. The method of claim 1, further comprising detecting a vacuum
pressure in the biopsy device, wherein the retracting step begins
after a predetermined minimum vacuum pressure has been met.
3. The method of claim 2, wherein the air vent port and the saline
vent port are closed until the minimum vacuum pressure is met.
4. The method of claim 3, wherein the biopsy cutting window is
closed until the minimum vacuum pressure is met.
5. The method of claim 1, further comprising retracting the cutting
cannula proximally while the saline vent is open.
6. The method of claim 1, wherein the drawing air step begins after
the drawing saline step begins.
7. The method of claim 6 wherein the saline vent is closed before
the drawing air step begins.
8. The method of claim 1, wherein the drawing air step begins 1.5
seconds after the retracting step begins.
9. The method of claim 1, further comprising: closing the air vent
port; and drawing saline into the outer cannula through the saline
vent port after closing the air vent port.
10. The method of claim 9, wherein the closing step begins 1.25
seconds after the drawing air step begins.
11. The method of claim 9, wherein the closing step begins 2.75
seconds after the retracting step begins.
12. The method of claim 9, further comprising detecting a vacuum
pressure in the biopsy device, wherein the retracting step begins
after a predetermined minimum vacuum pressure has been met.
13. The method of claim 12, wherein the air vent port and the
saline vent port are closed until the minimum vacuum pressure is
met.
14. The method of claim 13, wherein the biopsy cutting window is
closed until the minimum vacuum pressure is met.
15. The method of claim 9, further comprising retracting the
cutting cannula proximally while the saline vent is open.
16. The method of claim 9, wherein the drawing air step begins
after the drawing saline step begins.
17. The method of claim 16, wherein the saline vent is closed
before the drawing air step begins.
18. A method of controlling a biopsy device, the biopsy device
comprising a cutting cannula and an outer cannula, the outer
cannula defining a biopsy cutting window adjacent a closed distal
end thereof, an outer cannula lumen, an air vent port and a saline
vent port, the air vent port and the saline vent port being in
selective fluid communication with the outer cannula, the cutting
cannula defining an open distal end and a cutter lumen, the cutting
cannula being slideably disposed within the outer cannula, the
method comprising: applying vacuum through a proximal end of the
cutter lumen; retracting the cutting cannula proximally; drawing
air into the outer cannula through the air vent port; closing the
air vent port; and drawing saline into the outer cannula through
the saline vent port after closing the air vent port.
19. The method of claim 18, wherein the air vent port is closed
1.75 seconds after the retracting step.
20. The method of claim 18, wherein the drawing saline step begins
when the air vent port is closed.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of pending U.S.
patent application Ser. No. 13/383,318, filed Jan. 10, 2012, which
is a National Phase entry under 35 U.S.C. .sctn.371 of
International Application No. PCT/US2011/062148, filed Nov. 24,
2011, which claims the benefit under 35 U.S.C. .sctn.119 to U.S.
Provisional Application Ser. No. 61/417,096, filed Nov. 24, 2010,
entitled SYSTEM AND METHOD FOR REAL-TIME X-RAY IMAGING AND
CALCIFICATION HIGHLIGHTING OF BIOPSY SAMPLES DURING BIOPSY
PROCEDURES. The foregoing applications are hereby incorporated by
reference into the present application in their entirety.
FIELD OF THE INVENTION
[0002] Aspects of this invention relate generally to analysis of
tissue samples, and more particularly to preparing samples for
analysis and providing near real time or real time analysis of the
tissue sample.
BACKGROUND
[0003] Screening exams and biopsies are used to detect cancer and
other diseases. For example, a mammogram may be obtained to perform
a breast cancer screening exam. If an abnormality is detected
during the screening exam then a biopsy may be performed. One form
of breast abnormality which may be indicative of cancer is the
presence of micro-calcifications within the breast. In the case of
a breast biopsy, the patient is positioned so that the area of
interest associated with the abnormality can be localized, and one
or more biopsy or "core" tissue samples obtained using a biopsy
needle.
[0004] The tissue samples are then extracted from the needle and
placed on a specimen tray. An operator, such as a radiologist, then
arranges the samples on the specimen tray. These steps are made
more difficult because the samples may be tightly intertwined
against each other, and small parts must be manipulated by the
operator while wearing protective gloves. Once the samples are
arranged on the specimen tray, the tray is transported to an x-ray
machine which may be in a different room. Finally, the x-ray images
must be examined by skilled personnel for the presence of
microcalcifications or other abnormalities.
[0005] Micro-calcifications are easily seen in x-ray images. The
presence of calcifications in the captured images is indicative of
accurate targeting of the area of interest and the potential
presence of cancer. The absence of calcifications in tissue samples
is inconclusive because it can indicate either that the area of
interest is free of calcifications or that incorrect or
insufficient tissue has been biopsied to present the
calcifications. When samples with calcifications are not obtained
the biopsy procedure may need to be repeated, i.e., a second pass
biopsy. A second pass biopsy is generally undesirable because it
increases the amount of time the patient is in compression and the
overall procedure time.
[0006] When the biopsy procedure is completed the tissue samples
are sent to a pathology lab for further analysis. In many cases,
the user will separate the cores with calcifications, place them in
a separate specimen jar, and label as such for the pathologist.
This is accomplished by comparing the specimen tray with cores, to
the X-ray or radiograph of the specimen tray with cores. The
radiograph can then be correlated to the actual specimen tray and
cores. The user is then able to separate the cores with
calcifications and place them into a formalin jar. The cores
without calcifications are then placed in a separate formalin jar.
This process requires a large amount of manipulation of the cores
and requires a fair amount of human intervention.
[0007] It is known to decrease the amount of time required to
perform a biopsy by using a Radiography Specimen Cabinet (RSC).
RSCs are relatively small portable self-contained imaging systems
used to obtain images of small to medium sized tissue samples
following tissue removal. A RSC can be located close to the
location of the patient during the biopsy procedure, e.g., in the
same room, thereby reducing the time required to transport the
samples to x-ray imaging equipment. However, the time required to
remove and arrange the samples for imaging is still relatively
long.
SUMMARY
[0008] In accordance with one aspect of the invention an apparatus
comprises: a specimen holder that is able to receive excised tissue
from a biopsy device, the specimen holder adapted to fit within a
staging area of an analysis unit to enable analysis of excised
tissue.
[0009] In accordance with another aspect of the invention an
analysis system comprises: an energy source; an energy detector; a
staging area, positioned between the source and the detector and
adapted to contain a specimen holder, wherein a specimen is
transported to the specimen holder from a biopsy device and imaged
in the specimen holder using the source and detector.
[0010] In accordance with another aspect of the invention a biopsy
device comprises: a cannula for cutting tissue; a first port on the
cannula for coupling to a fluid supply system; a second port for
coupling to a vacuum system; and a venting system, the venting
system controlled to assist movement of tissue from the biopsy
device to a specimen radiograph for analysis of the tissue.
[0011] In accordance with another aspect of the invention a method
comprises: extracting a tissue specimen with a biopsy device having
an inner cannula and an outer cannula, the extracted specimen being
disposed in the inner cannula; transporting the tissue from the
inner cannula to a specimen holder disposed within a staging area
of an analysis unit; and analyzing the specimen.
[0012] In accordance with another aspect of the invention a
apparatus comprises: a specimen holder that is able to receive
excised tissue from a biopsy device, wherein the specimen holder,
or portion of, can be removed from the biopsy device and allow
analysis of the specimen holder, or portion of, and captured tissue
while providing an analysis substantially free of artifacts.
[0013] Some features and benefits of aspects of the invention
include providing a analysis of each tissue sample core as it is
obtained with the biopsy device in order to provide near real time
feedback to the physician during the procedure, and providing a
core handling feature to help reduce or eliminate the need to
manipulate specimens from biopsy through placement into a specimen
jar while enabling communication to the pathologist which cores
have calcifications. Other aspects of the invention help to match
particular tissue samples with corresponding images. Still other
aspects of the invention at least partially automate sorting of
tissue samples based on a particular characteristic. These and
other aspects of the invention are advantageous because they help
to reduce the duration of a biopsy procedure, reduce the number of
second pass biopsies, reduce the amount of tissue excised during a
biopsy procedure, and reduce the overall cost of providing patient
care.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a block diagram of a system for inline tissue
sample transport and imaging for real-time tissue analysis during a
biopsy procedure.
[0015] FIG. 2 illustrates an embodiment of the system of FIG. 1 for
performing breast biopsy procedures.
[0016] FIG. 3A illustrates a biopsy device according to the present
invention in greater detail.
[0017] FIG. 3B is an expanded view of the cannula of the biopsy
device of FIG. 3A.
[0018] FIG. 3C is a flow diagram provided to illustrate exemplary
steps in a process for in-line imaging of excised tissue according
to principles of the present invention.
[0019] FIGS. 4A and 4B are perspective diagrams illustrating an
exemplary specimen holder of the present invention.
[0020] FIGS. 5A and 5B are diagrams of a RSC and specimen holder of
the present invention, provided to illustrate the ease of access to
the specimen holder in the staging area.
[0021] FIGS. 6 and 7 illustrate various embodiments of a RSC, each
with different arrangements of the x-ray source and detector.
[0022] FIG. 8A illustrates an exemplary display and associated
interface features in block diagram form.
[0023] FIG. 8B illustrates an exemplary interface screenshot.
[0024] FIGS. 9A through 9C illustrate an alternate embodiment of
the specimen holder which is disposed in the staging area for
facilitating imaging of tissue samples.
[0025] FIGS. 10A through 10C illustrate variations of the specimen
holder of FIGS. 9A through 9C with various other types of
valves.
[0026] FIG. 11A illustrates an alternative embodiment the specimen
holder including one or more bypass channels for permitting the
passage of fluids around the valve.
[0027] FIGS. 11B and 11C illustrate operation of the specimen
holder of FIG. 11A.
[0028] FIG. 11d illustrates a variant in which a filter is placed
in a main channel and a series of filters allow fluid to flow into
a bypass channel.
[0029] FIG. 12a illustrates another alternative embodiment of the
specimen holder.
[0030] FIGS. 12b and 12c illustrates variants in which a main
channel branches into two subchannels.
[0031] FIGS. 13A through 13D illustrate another alternative
embodiment of the specimen holder.
[0032] FIG. 14A illustrates a specimen holder which captures
multiple samples for simultaneous imaging.
[0033] FIGS. 14B through 14C illustrate operation of the sample
holder of FIG. 14A.
[0034] FIG. 14D illustrates an alternate embodiment of the specimen
holder in which a cylindrical filter is disposed around the
aspiration tube.
[0035] FIGS. 15A and 15B illustrate a variant of the embodiment of
FIGS. 14A-14D in which an inlet port and outlet port are integrated
with a container.
[0036] FIG. 15C illustrates a lid for enclosing the samples.
[0037] FIGS. 16A, 16B, and 17A through 17C illustrate another
alternative embodiment of the specimen holder.
[0038] FIGS. 18A, 18B, and 19 illustrate yet another embodiment of
the specimen holder.
[0039] FIGS. 20A through 20C illustrate an alternative embodiment
of the specimen holder in which captured samples are automatically
arranged for individual identification.
[0040] FIGS. 20d, 20e and 20f illustrate a mechanism to synchronize
the biopsy device and tissue filter to enable tracking clock
position of cores.
[0041] FIGS. 21A and 21B illustrate another variation of a rotating
cylinder specimen holder.
[0042] FIGS. 22A through 22D illustrate an alternative
compartmentalized specimen holder.
[0043] FIG. 23 illustrates a multi-channel tissue sample sorting
system.
[0044] FIG. 24 illustrates an alternative tissue sample sorting
system.
[0045] FIG. 25 illustrates a variation of the embodiment of FIG.
24.
[0046] FIG. 26A illustrates use of the biopsy suite.
[0047] FIGS. 26B and 26C illustrate an alternate embodiment of the
biopsy suite of FIG. 26A.
DETAILED DESCRIPTION
[0048] FIG. 1 is a block diagram of a system for inline sample
transport and imaging for real-time analysis of biopsy samples. A
biopsy sample excision tool 100 such as a biopsy device is coupled
to a sample analysis tool 102 such as an x-ray imaging station via
an automated sample transport system 104. A tissue sample is
obtained from the patient using the excision tool 100. The sample
transport system 104 moves the excised tissue sample 108 from the
excision tool to the analysis tool. The transport system is
"inline" because the tissue sample is moved into position to be
imaged without the need for manual transport and arrangement, or
with minimal need for manual intervention. Results from the
imaging, e.g., radiograph and possibly highlighting of
calcifications, if present, are then provided via an interface 106
such as a display. Calcifications normally appear in x-ray images
as an area characterized by a contrast in brightness, but
highlighting on the interface may include automated detection and
flagging of calcifications or other indicators in images using
image processing algorithms. The analysis or radiograph is "near
real time" because the results can be presented during the biopsy
procedure, e.g., within seconds of tissue excision, or prior to
excision of a subsequent core sample, or simply in less time than
the current time for prepping cores and obtaining a radiograph.
Consequently, the physician has more information during the
procedure to help obtain the target calcifications. Alternatively,
any type of analysis could be conducted on the tissue including but
not limited to Xray as mentioned above, PET, MRI, Ultrasound,
Spectroscopy, OCT, X-ray diffraction, etc.
[0049] FIG. 2 illustrates a biopsy suite embodiment of the system
of FIG. 1. The biopsy suite includes a Radiography Specimen Cabinet
(RSC) 220 coupled to a biopsy device 212. The biopsy device of 212
in one embodiment is a so-called Vacuum Assisted Breast Biopsy
(VABB) device such as the Eviva.RTM. VABB device provided by
Hologic, Inc., of Bedford Mass., although it is appreciated that
other types of biopsy, tissue, fluid, or cell removal devices may
be readily substituted herein without affecting the scope of the
invention. The biopsy device 212 may be coupled to a console 240
via tubing 213, 219. The console 240 may provide sources of vacuum,
pressure, and fluid (liquid and/or gas) during the biopsy
procedure. One example of such a console is the ATEC.RTM. Pearl
console, also provided by Hologic, Inc., although any form of a
device capable of controlling cutter movement and optionally vacuum
may be used.
[0050] The RSC includes x-ray imaging equipment for imaging an
excised tissue sample in a viewing or "staging" area 225. After the
biopsy sample is excised from the breast using the biopsy device
212, the sample is pulled through the tubing 213 to the staging
area 225 by vacuum from console 240. A fluid such as saline may be
used to lavage the breast cavity during excision, and to vent the
core sample to facilitate transport to the RSC. In various
embodiments which will be described below a specimen holder 242 may
be disposed in the staging area 225 for delaying or stopping
movement of the tissue sample through the staging area for at least
a period of time sufficient to obtain an x-ray image of the tissue
sample. In some embodiments the specimen holder 242 also functions
as a tissue collection filter for collecting imaged tissue samples.
In alternative embodiments a separate optional tissue collection
filter may be used downstream relative to the specimen holder,
e.g., in the RSC cabinet, in the console, or between the cabinet
and console. A keyboard and/or touchscreen display 250 coupled to
the RSC 220 may be used to accept input and provide information to
the operator regarding imaging. For example, an image of the sample
may be presented for viewing and classification.
[0051] FIG. 3A illustrates an exemplary biopsy device in greater
detail. The biopsy device includes a biopsy needle 300. The biopsy
needle may be arranged as a tube within a tube. Such arrangements
generally include an piercing cannula having a sharp distal tip and
a cutting window or other opening proximal to the distal tip. The
inner and/or outer move with respect to one another in order to
sever any tissue in the cutting window. In the embodiment of FIG.
3A, the biopsy needle is coupled to a biopsy device 302. In various
embodiments, the biopsy device may be configured for hand-held
biopsies, or may be mounted to a support for stereotactic
biopsies.
[0052] The biopsy device includes a plurality of inlet/outlet
ports, through which are coupled a corresponding plurality of
tubes. They may include a vacuum port coupled to vacuum tube 316, a
saline port coupled to saline line 318 and a vent port coupled to
vent line 312. Pneumatic ports, coupled to pneumatic lines 314a and
314b, may also be provided to control pneumatic type VABB devices,
although they may not be required for biopsy devices which use
other drive mechanisms such as electrical systems or drive
cables.
[0053] FIG. 3B illustrates an exemplary placement of the saline
port 308 and vent port 310, which extend through the walls 306 of
the outer cannula of biopsy needle 300. Venting can be performed
with fluid including but not limited to saline or air at a pressure
above perfect vacuum (e.g. -28 in Hg, -27 in Hg, . . . 0 inHg, 20
in Hg, and so on). Venting relieves the potential vacuum lock
created between the core and the cavity, as the core is removed
from the cavity. This facilitates easy removal of the core from the
body. It is also recognized, that the tissue could also be removed
without venting. During the biopsy, saline is applied through port
308 to lavage the biopsy cavity and vent the core. To enhance core
transport speed it may be desirable to vent with air rather than
saline. The optional vent port 310 is one possible feature for air
venting. Alternatively, venting could be implemented by introducing
air to the saline line and eliminating the need for a separate vent
port 310. Alternatively, air or saline could be used alone through
the saline port 308 to vent the core, and eliminating the need for
the second vent port 310. Although it is not required to provide
such a vent port, according to one aspect of the invention it is
realized that venting the outer cannula with air in this manner
greatly improves the speed of travel of the biopsy core through the
inner cannula to the tissue specimen holder.
[0054] Referring to FIGS. 2, 3A and 3B, when used with the present
invention, the vacuum source provided by the console pulls tissue
into the cutting window, and as the inner cutter traverses past the
cutting window, the tissue within the cutting window is severed
from the patient to produce the biopsy sample, or biopsy `core`.
The biopsy sample is pulled through the inner cannula and through
the tube 316 towards the console, and captured in the interim by
the specimen holder 242. Controlled (non-constant) venting of the
core using the system controlled vent line 312 expedites the
movement of the core along the vacuum line 316 towards the specimen
holder 242. Controlled venting is a process that controls when the
vent line and/or saline line opens to the atmosphere or saline
source. Thus, relieving the potential vacuum lock created between
the core and the cavity, as the core is removed from the cavity.
Controlled venting implies that the vent source is not always open
to relieve this vacuum lock. However, it should be noted that
venting might alternatively be constant and always open to relieve
the vacuum lock.
[0055] FIG. 3C is a flow diagram outlining an exemplary process for
core collection using the biopsy device of the present invention.
In one embodiment, each step within this process is automatically
controlled in a timed sequence following sequence initiation, where
sequence initiation may be caused by manual or other means. Other
embodiments envision combinations of automation and manual
intervention. In the process of FIG. 3C the depression of a foot
pedal signals the start of each core acquisition. At step 350 the
system is in standby mode prior to the initiation of the biopsy. At
this point the cutting window is closed. First the biopsy needle is
inserted into the appropriate location in the patient's breast.
Then, at step 352 start of the biopsy is initiated, for example by
depression of a foot pedal or other form of input. The biopsy cycle
thus begins at step 354; at this point the vacuum pressure begins
building while the biopsy cutting window is still closed (i.e., the
cutter is advanced to a position such that it covers the biopsy
cutting window). The saline and vent lines are also closed at this
point.
[0056] At step 356 the minimum vacuum pressure is met. Once the
minimum vacuum pressure is reached at step 356 the cutting window
is opened and saline flows through saline line 318 (FIG. 3A) into
the outer cannula 306 (FIG. 3B) via port 308 (FIG. 3B) and
ultimately through the cutting window, lavaging the cavity at step
358. Thereafter the saline line is closed, and the inner cannula
rotates and advances, extracting a core at step 360. At step 362
the cutting window remains closed during the dwell period, ensuring
a complete cut of the sample. At step 364 both the saline line and
cutting window are open, at which point saline is allowed to be
pulled into the outer cannula to relieve the vacuum lock, and the
increased vacuum draws the core tissue back through the inner
cannula and handpiece towards the vacuum line. At step 368 the vent
line is opened, allowing air to also be vented into the outer
cannula, to expedite movement of the core to the specimen holder.
At step 370 the vent line is closed, and the lavage of the cavity
and the inner cannula continues.
[0057] During this lavage, the core advances into a location in the
filter assembly. At step 372 the filter assembly is indexed. The
indexing step rotates the specimen holder such that the core that
was just received is now aligned with the x-ray source and detector
and ready for analysis.
[0058] At step 374 an x-ray of the core is obtained and at step 376
the x-ray image is displayed to a medical professional. The image
may be displayed at display 250 (FIG. 2), or on a workstation or
other imaging device which is coupled to the RSC. In one
embodiment, the display 250 includes a user interface which allows
the medical professional to mark the image, where the mark may be a
particular location in the image that is of interest, or just
reference the fact that the image is of interest. As will be
described in more detail below, the image that is displayed may be
a raw image, or may be an image which is processed using computer
assisted detection (CAD) software to highlight regions of interest
within the image. The display may include zoom capabilities or
other methods for modifying the image, and storing the modified
image, along with or in place of the original image, for later
review. This process may continue for example until all desired
cores have been harvested or until the specimen holder 242 (FIG. 2)
is full, or the user wishes to stop taking samples. The specimen
holder or a filter element therein is then replaced, emptied or
otherwise prepared, although additional cores might also be
captured even if the filter is full, e.g., multiple cores would
occupy a single chamber.
[0059] In one embodiment of the invention, a location, or each
chamber, within the specimen holder can be correlated to an image
of that particular location or chamber, e.g. the specimen holder
has unique identifiers that are visible in the radiograph and by
the naked eye. Relating a location within the specimen holder to an
image facilitates later review of the biopsy results; that is a
medical professional can more quickly identify the particular core
which displayed a calcification. According to a further aspect of
the invention, the location within the specimen holder is further
correlated to a particular rotational angle of the cutting window
of the biopsy needle. Many biopsy devices can be rotated or include
a rotatable outer cannula or device which permits extraction of
tissue in a 360 degree circumference around the insertion location
of the device. The ability to relate a particular location in the
specimen holder to an angular rotation of the biopsy window of the
device provides additional information regarding where, within the
breast, calcifications were obtained.
[0060] Referring briefly to FIGS. 4A and 4B, a diagram of a
representative specimen holder 242 of the present invention is
shown to include a plurality of tissue accepting slots 243, an
inlet port 245 and an outlet port 246. This so-called carousel type
specimen holder 242 is preferably formed from a radiolucent
material. The inlet port 245 is coupled to a first portion of the
vacuum line (i.e., an upstream portion) and the outlet port 246 is
coupled to a second portion of the vacuum line. During core
collection, tissue is forwarded through the vacuum line, into the
inlet port, and captured in the individual slots. Excess saline and
bio-fluid flows through the carousel of the specimen holder to
outlet port 246, and out towards a collection filter in the
console. In one embodiment the x-ray source and detector are
aligned with a specimen holder slot immediately adjacent to the
inlet port. The filter is then indexed after receiving the core, to
align the core with the x-ray source and detector. Alternatively,
the analysis or imaging could occur over any slot or image the
entire specimen holder. Alternatively, the core may be presented
for imaging using other means. As shown in FIG. 4A each slot is
assigned a unique identifier 247. In the illustrated example the
unique identifier is a number for the slot, although other
identifiers such as letters, barcodes, raised nubs, etc may be
readily substituted therefore. More specifically, uniquely marking
the slots, e.g., with radio-opaque markings, helps to match samples
with associated images, provided such markings do not interfere
with the x-ray.
[0061] In one embodiment the system is arranged so that the initial
core is always captured in a pre-identified slot. The specimen
holder may be designed with a feature that facilitates the
alignment of the specimen holder in a particular position for the
start of a biopsy. The alignment mechanism may be something as
simple as a tab or slot, or may use other means, such as magnetic
orientation or the like to ensure that the appropriate slot is in
the proper location during the start of a biopsy. A Hall effect or
other device can be used to orient the carousel relative to a home
position, e.g., where the initial compartment is aligned with the
inlet port.
[0062] A belt, gear, chain, or any means to transfer rotation is
coupled to either a central axle or the outside surface of the
carousel of the specimen holder. A motor drives the belt, gear,
chain, or other to rotate the carousel. The belt, gear, chain, or
other may be formed of radiolucent material so as not to interfere
with image acquisition, and/or may be positioned such that it is
not aligned with the x-ray source and detector. Direct drive and
other systems could alternately be used. The filter base and/or
sidewalls may be mesh or other permeable material to facilitate
draining bio-fluids away from the captured samples while still
preventing the captured samples from exiting through the outlet
port. The x-ray or radiograph of the specimen is taken and
presented to the user. There could be one single radiograph or
multiple. For example, a single radiograph could be taken of the
entire specimen holder and capture images of all cores at once. Or,
a radiograph of each individual chamber could be taken and
presented to the user. In either embodiment, the radiograph may be
labeled to correlate with the unique labeling on the filter. This
can be accomplished using radiopaque markings on the filter that
can be seen by the naked eye and that also appear on the
radiograph, e.g. radiopaque ink to label each chamber numerically,
alphanumerically, symbols, or other means. This could also be
accomplished by labeling the filter with a unique label visible to
the naked eye, and then having the unique filter chambers
identifiable by the RSC (e.g. filter uniquely labeled
alphanumerically, when installed into the RSC it is able to
determine the position of each unique chamber and track it as it is
indexed and then label it as shown in FIG. 8b--"A", "B", and
"C").
[0063] It should be noted that although automated systems for
specimen capture and analysis are described herein, manual steps
could be implemented to facilitate either or both specimen capture
and analysis. For example, the specimens or specimen containers
could be manually moved into the analysis device. Similarly, push
button controls could be used to begin analysis or other steps.
[0064] Once the biopsy has been completed, the medical professional
can remove the filter or specimen holder from the specimen tray.
FIG. 5A is a view of the RSC showing the specimen holder in an open
position. As shown in FIG. 5B, the operator may remove the cover
291 of the specimen holder in order to gain access to an inner
filter 293 or retaining member which is removed from the specimen
holder The filter 293 contains all of the cores. The filter 293 can
be capped or covered, and placed into a specimen jar filled with
formalin. Alternatively, the specimen holder and integral filter
could be designed to be removed from the RSC, filled with formalin
or other fixative, then capped to double as specimen holder and
specimen jar. Although saline and bodily fluids are transferred
through the specimen holder during the biopsy process, the tubing
and specimen holder are water tight in arrangement, and therefore
no hazardous waste remains in the RSC following the biopsy process.
The user has the option to review the radiograph(s) and determine
which cores have calcifications. For example, FIG. 8b shows three
radiographs. The user would review the three radiographs and
determine which cores have calcifications. The user can now
communicate to the pathologist which cores have calcifications,
e.g. cores in chambers A, and C have calcifications. Specimen jars
and labels could be customized to facilitate this communication,
e.g. labels on specimen jars with "Cores with Calcifications are
located in chambers--(fill in the blank)." The cores are ready for
transport to the pathology lab for further analysis. Another
carousel or retaining member can be placed in the specimen holder
in order to prepare for a subsequent procedure. This describes a
new system that provides near real time feedback (e.g. radiograph
or other analysis means) to the user during the procedure, and
enables the user to communicate to the pathologist which tissue
specimen may have an abnormality (e.g. calcification if using
radiograph, or abnormal area using other analysis means).
[0065] FIGS. 6 and 7 illustrate embodiments of the RSC in greater
detail. Some features are common to both embodiments. For example,
input ports 427, 527 represent a group of ports (such as those
shown in FIG. 3A) that link the RSC to the biopsy device (212, FIG.
2) and output ports 429, 529 represent the group of ports (such as
those shown in FIG. 3A) that link the RSC to the vacuum console
(240, FIG. 2). The ports may be configured to allow for easy
connection and disconnection of the tubing such that the biopsy
needle can be connected and disconnected to and from the RSC, and
would also allow the entire specimen holder to be removed from the
biopsy device. Such a modular configuration facilitates mobility
and advantageously allows use of different excision and analysis
tools and vacuum sources. Both embodiments include an x-ray source
421, 521 such as a micro focus X-ray tube, a collimator (not
shown), a x-ray detector 423, 523, an exposure timer (not shown)
and a staging area 425, 525. According to one aspect of the
invention, the detector is a direct digital detector, providing
high quality images for rapid specimen verification. Both
embodiments are also enclosed in cabinets 422, 522 having
sufficient shielding to isolate the x-ray energy. As discussed
above, an interface with I/O devices such as a keyboard and display
450, 550 may be integrated with or otherwise coupled to the RSC.
Wheels may be attached to the cabinets to facilitate mobility.
[0066] A principal difference between the embodiments of FIGS. 6
and 7 is the relative orientation of the detectors 423, 523
relative to the x-ray sources 421, 521. In the embodiment of FIG.
6, the x-ray source 421 and x-ray detector 423 are positioned for
horizontal imaging because the x-ray source directs energy
vertically within the cabinet towards the detector. It will be
appreciated that the x-ray source could be positioned either above
or below the specimen holder. In the embodiment of FIG. 7, the
x-ray source 521 and x-ray detector 523 are positioned for vertical
imaging because the x-ray source directs energy horizontally within
the cabinet towards the detector (note that the x-ray source could
be on the left or right). Other orientations might also be used.
Orientation of the x-ray source and detector is a matter of design
choice which may depend upon factors such as cabinet dimension
constraints, port location and bend radius of the tubing used to
move the sample within the cabinet. Consequently, the present
invention is not limited to use with a RSC having any particular
x-ray source/detector orientation.
[0067] FIG. 8A illustrates aspects of a RSC display 600 and
associated interface features in block diagram form. The display
600 may include a radiograph viewing window 610 for providing
relatively instantaneous acquisition information to the operator. A
keyboard 650, which may include a mouse, joystick, or other manual
controllers, may be used to manipulate the acquired image. A touch
screen might also, or alternatively, be used. A pull-down menu or
other interface 620 may be provided to enable the operator to
customize acquisition parameters such as exposure time, kV, AEC
parameters, etc. In addition, a status window 630 may be provided.
The status window may include information such as the number of
samples acquired and number of calcifications detected. In one
embodiment, the interface may provide an audible or visual
indication to the operator in regards to whether the current
radiograph or prior radiograph contains calcifications. The
indication may include, for example, ringing a bell, displaying a
pop-up window, checkmarks or borders on thumbnails, circles around
calcifications on radiographic images, or displaying some other
visual indicator. As discussed previously, it is further envisioned
that the display or user interface could also include controls
which permit a user to dynamically process an image, such
processing ability including the ability to apply different filters
to the image, uses CAD algorithms to process the image, resize the
image, mark the image, mark regions in the image, etc. It is
further envisioned that the display may include thereon a `bucket`
which would enable the user to drag and drop images of interest to
the medical professional, allowing the professional to dynamically
manage their workflow.
[0068] Referring to FIG. 8B, the display shows a picture or live
video 690 of the specimen holder and a radiograph 692 of a specific
core sample in the specimen holder. The video may be presented in
real-time such that the operator can see what is currently
happening within the staging area. The radiograph may be slightly
delayed or real time such as fluoroscopy. The operator may thus be
able to view the video and imaged calcifications 694 in real time
or near real time.
[0069] Computing resources such as a processor 660 and memory 662
are coupled between the display 600 and detector. Software which is
stored in the memory (a non-transitory computer readable medium) is
included for processing image data associated with tissue samples,
for example including the software allowing the operator and others
to view and manipulate the images, perform other image processing,
data collection, and data management functions. As mentioned above,
the software may include one or more image control and Computer
Assisted Detection (CAD) programs with a display feature 640 for
highlighting calcifications, abnormalities or other regions of
interest in images, and representing the identified regions of
interest to the operator, e.g., a surgeon or radiologist. The
software may cause the processor and display to provide indications
to the operator regarding the presence and/or absence of
calcifications in an image acquired by the RSC, including visual or
audio feedback which indicates detection of calcifications or the
location of detected calcifications. The display, computing
resources and other JO devices may be configured to enable the
surgeon/radiologist to customize one or more x-ray acquisition
parameters, including voltage, magnification, duration, etc.
[0070] FIGS. 9A through 9C illustrate an alternate embodiment of
the specimen holder 242 (FIG. 2) which is disposed in the staging
area for facilitating imaging of tissue samples. The illustrated
specimen holder includes a valve 750 coupled between an inflow line
751 and an outflow line 752. The valve is operative to temporarily
stop a tissue sample 108. Optional connectors 749 and 759 are
coupled to the inflow and outflow lines, respectively. Luer taper
or similar friction fit connectors may be used, but the invention
is not limited to any particular type of connector. In this
embodiment the valve 750 may be a normally closed (NC) type which
is adapted to permit fluid flow in both the open and closed states.
In particular, the valve is adapted to function as a filter when in
the closed state. This may be accomplished by replacing material
from a portion of the valve that would normally block fluid flow in
the closed state with a mesh type screen. The screen is
characterized by a gauge selected to permit fluid flow but prevent
passage of the tissue sample. Any type of valve might be
utilized.
[0071] The valve 750 is actuated in response to a valve control
device 717. The valve control device can include mechanical,
electrical and electronic elements for exerting control over the
valve. In particular, the valve control device is operative to
cause the valve to change state, i.e., open or close. The valve
control device may operate in response to a trigger condition,
e.g., motion detection by a motion sensor associated with the valve
control device 717, timing based on the console or cycle, or a
manual trigger. Motion could initially be detected from the
presence or approach of a tissue sample in the inflow line 751.
Alternatively, or additionally, the trigger condition may include
the detection of a pressure differential between the inflow line
751 pressure P2 and the outflow line 752 pressure P1 using pressure
transducers associated with the valve control device 717. The lack
of a difference in pressure is indicative of the absence of a
sample, and a difference in pressure is indicative of the presence
or approach of a tissue sample in the inflow line 751. The valve
could alternatively be actuated by console input, e.g., closed for
most of cycle to capture and image the core, and open for a short
interval to release the core.
[0072] The trigger condition may be used to initiate a time
sequence of events including the acquisition of an x-ray image by
the RSC followed by the opening of valve 750 to release the tissue
sample 108 into the outflow line 752. For example, FIG. 9B
illustrates a gate type normally closed (NC) filter valve gate 755
in a closed position. Fluid flows through a mesh in the valve gate
755 in the closed position. As the tissue sample 108 is received in
the inflow line 751, its movement is impeded by the mesh of valve
gate 755. Fluid pressure P2 increases behind the tissue sample in
the inlet line 751 because the sample impedes fluid flow through
the mesh portion of the valve gate 755. The presence of the tissue
sample is detected by the valve control as already described above,
e.g., based on pressure differential (P2>P1). In response, the
valve control device prompts the RSC computing resources to acquire
an x-ray image of the captured sample. A timer or return signal
indicates to the valve control device that the image has been
captured. In response, as shown in FIG. 9C, the valve gate 755 is
opened by the valve control device 717. Back pressure in the inflow
tube then flushes the sample 108 into the outflow tube 752 toward
the console or other tissue collection device. The resulting lack
of a pressure differential between the inflow line 751 and outflow
line 752 due to removal of the sample is then detected by the valve
control device, which prompts the valve gate to close in response.
Alternatively, motion detection, console output, manual trigger,
pressure monitoring, etc and any combination of could be used to
initiate the timed sequence of events described above. Moreover,
tissue capture, imaging, and valve operation can be controlled
based on sensing presence of tissue or timing of console/cycle.
[0073] FIGS. 10A through 10C illustrate variations of the specimen
holder of FIGS. 7A through 7C with various other types of valves,
including a ball valve 856, a paired gate valve 858 and a solenoid
valve 854. These valves may be controlled to open following
detection of the presence or approach of the tissue sample as
described above. Alternative valves may include, but are not
limited to, a gate valve, butterfly valve, diaphragm valve,
solenoid valve, and pinch valve.
[0074] Referring now to FIG. 11A, in an alternative embodiment the
specimen holder includes one or more bypass channels 953 for
permitting the passage of fluids around the valve 750. One benefit
of the bypass channel is avoiding cutoff of vacuum to the biopsy
device and movement of saline and cores when a core or cores are
captured against a filter. Further, in this alternative embodiment
the valve fluid flow in a closed state as the valve could be made
of a mesh type of filter. The fluid bypass channel 953 is coupled
between the inflow line 751 and the outflow line 752 to allow fluid
to bypass once a core has been capture by the valve and has
obstructed flow through the valve. In this condition, flow through
the bypass will increase and pressure will rise in the bypass. The
pressure could be monitored to determine when a core has been
captured by the valve. Mesh filters 960 and 961 are disposed across
connecting openings between the bypass channel and inflow and
outflow lines to prevent biopsied tissue from entering the fluid
bypass channel 953.
[0075] Operation of the specimen holder is shown in FIGS. 11B and
11C. FIG. 11B illustrates a tissue sample 108 being captured
against the valve 750, which is closed. The captured core sample
blocks flow through the valve and increases flow and pressure
through the bypass line. A valve control and pressure transducers
may be used to detect the presence of the tissue sample as already
described above. A timer or motion detector might alternatively or
additionally be used. Regardless of which technique is used to
detect the presence of the tissue sample, the image is then
acquired and the valve is opened to flush the imaged sample. FIG.
11C illustrates the imaged tissue sample moving through the open
valve into the outflow line. When the elevated pressure is no
longer detected the valve control prompts the valve to close. A
timer or motion detector might alternatively or additionally be
used.
[0076] FIG. 11d illustrates a variant in which a filter 791 is
placed in a main channel 789 and a series of filters 793, 795, 797
allow fluid to flow into a bypass channel 799. Filter 791 may have
greater unobstructed flow capacity than filters 793-797, and
filters 793-797 may be arranged in order of diminishing
unobstructed flow capacity such that a tissue sample proceeds
downstream without being captured against an upstream filter, e.g.,
because greater force moves the sample toward the downstream
filter. As such, cores are captured and stored in series in the
main channel 789. All of the cores can be imaged together, or the
linear arrangement of cores could be moved under an analysis unit
and analyzed section by section.
[0077] FIG. 12a illustrates another alternative embodiment of the
specimen holder. The illustrated embodiment includes multiple fluid
bypass channels 1053 and 1063. FIGS. 12b and 12c illustrate
variants in which a main channel 1065 branches into two subchannels
1067, 1069. The subchannels may or may not reconnect and reform the
main channel. Each subchannel includes a valve 1071 with a filter
that allows fluid to pass when the valve is closed. Initially, a
tissue sample will enter either the first subchannel 1067 or the
second subchannel 1069, lodging against the closed valve. The
sample impedes the flow of fluid through the valve against which it
is lodged so a second tissue sample is directed by fluid flow into
the other subchannel. The first captured tissue sample is then
released by opening the valve, and a third tissue sample is
directed into the free subchannel because the flow of fluid through
the valve in the other subchannel is impeded by the second tissue
sample. Hence, tissue samples are alternatingly directed into
different subchannels where they may be analyzed prior to being
released.
[0078] FIGS. 13A through 13D illustrate another alternative
embodiment of the specimen holder. In this embodiment a rotatable
tissue sample positioning mechanism 1170 with an interior channel
1177 and a filter 1172 are used to temporarily capture the tissue
sample for imaging. The positioning mechanism 1170 may include a
modified ball valve. An optional fluid bypass channel 1173 may be
coupled to inflow and outflow lines via optional pressure sensitive
valves 1174, 1175 and optional filters disposed across connecting
openings between the bypass channel and inflow and outflow lines.
With the pressure sensitive valves 1174, 1175 closed, the tissue
sample 108 from the biopsy needle is pulled through the inflow line
into the interior channel until it is stopped by the filter 1172,
as specifically shown in FIG. 13B. Pressure in the inflow line
tends to increase due to the sample impeding flow of fluid through
the filter. The presence of the tissue sample may be detected using
motion detection or pressure differential mechanisms similar to
those described above. In response to detection of the presence of
the sample the x-ray equipment is prompted to image the sample. The
sample may be imaged with the positioning mechanism oriented as
shown in FIG. 13B. Alternatively, the positioning mechanism is
rotated ninety degrees (or some other amount) to move the sample
into a desired imaging position as shown in FIG. 13C. The resulting
increase in pressure is detected by valve 1174, which opens in
response. Valve 1175 subsequently opens in response to a pressure
increase following opening of valve 1174. Once the sample has been
imaged the core positioning mechanism is rotated, e.g., a further
ninety degrees, so that the filter of the interior channel is
upstream relative to the sample, e.g., proximate to the inflow
line. When the interior channel is again aligned with the inflow
line the flow of fluid through the interior channel moves the
sample into the outflow line as shown in FIG. 13D. Also, the
decrease in pressure causes valves 1174 and 1175 to close. When the
sample is no longer detected as being present the sample holder is
reset by rotating the positioning mechanism back into the position
shown in FIG. 13B. Alternatively, the filter might be positioned
such that a subsequent sample can be captured with the positioning
mechanism in the position which released the previous sample, e.g.,
using a filter disposed at the center of the interior channel. A
variety of other positioning mechanisms which detect the presence
of the sample and respond by sliding or otherwise moving the
interior channel along an x, y and/or z axis into a desired
position are contemplated herein and are therefore within the scope
of this invention.
[0079] The specimen holder variants described above in which a
channel is divided into multiple channels can be implemented in
embodiments where channels reconnect, remain separate, or some
combination thereof, e.g., some reconnect and some remain separate.
Further, the specimen holder variants described above could be
placed in series or parallel configurations in the staging area
such that multiple specimens could be imaged simultaneously.
Furthermore, the RSC could include multiple staging areas. It is
also envisioned that a single specimen holder could capture
multiple samples for simultaneous imaging (e.g. tissue filter with
a single compartment that captures multiple cores and images them
together). For example, rather than imaging samples individually to
locate calcifications, real-time imaging of multiple cores may be
performed to determine either when any calcified tissue has been
extracted, or when a threshold amount of calcified tissue has been
extracted. The tissue samples may be removed from the RSC and
forwarded to a lab for further analysis. Specimen holders for
capturing multiple calcifications for simultaneous imaging may
include features that facilitate distribution of individual samples
within the specimen holder.
[0080] FIG. 14A illustrates a specimen holder which captures
multiple samples for simultaneous imaging. The illustrated specimen
holder includes a container 1285 and a cap 1283, each of which is
made of radiolucent material. An angled or flat ramp 1287 is
mounted within the container. The cap 1283 includes an inlet port
1281a and an outlet port 1281b. The inlet port is coupled to the
biopsy needle via tubing. The outlet port is coupled to the vacuum
console via tubing. The cap 1283 includes a channel 1290 which
extends from the inlet port partially into the interior volume of
the container. An aspiration tube 1286 extends perpendicularly from
the outlet port 1281b of the cap. A cylindrical filter 1292 extends
perpendicularly from the cap to the base of the container when the
specimen holder is assembled, thereby separating the inlet port
from the outlet port.
[0081] Referring now to FIGS. 14B through 14C, a tissue sample and
fluid from the biopsy needle enters the specimen holder through the
inlet port, traverses channel 1290, and is deposited on ramp 1287
(or on other tissue samples already deposited on the ramp).
Application of vacuum pressure via the aspiration tube removes
fluid so as to maintain the fluid level within the container at a
level below the ramp and ensures that all saline or fluid remains
in the gutter formed around the ramp. Consequently, fluids drain
off of tissue samples which have been deposited on the ramp.
Separating fluid from the samples is advantageous because the fluid
can mask the outline of the core in the image. The tissue sample is
prevented from being sucked out of the outlet port by the filter
which separates the innermost volume of the specimen holder from
the aspiration tube. When a desired number of tissue samples have
been collected, the samples are imaged in the specimen holder. This
image could be taken after each core, after two cores, or any
interval including one at the end of the procedure. This holds true
for any of the specimen holders described. The specimen holder and
components are designed to reduce interference or any error
associated with the analysis (e.g. the design will be radioluscent
and of uniform signal in the imaging area if X-ray is used). The
cap can then be removed from the container in order to allow
removal of the imaged samples.
[0082] It should be appreciated that all mentioned embodiments of
the specimen holder and tissue filter that actively capture and
secure tissue are able to be used to capture tissue samples without
an inline RSC. For example, tissue samples captured in the carousel
type specimen holder described in FIGS. 4a and 4b, or the filter
specimen holder described in FIGS. 16-18, along with other
embodiments, could be used without an in line analysis type of
system. The specimen holder, or a component of, would be removed
from the biopsy device and taken to an X-ray system (RSC or
Mammography unit) that is typically located outside of the biopsy
suite. This still eliminates or reduces the need to manipulate
individual cores in preparation for the specimen radiograph.
Further, the tissue samples could be imaged both by the in-line RSC
and some other device. In addition to helping to avoid manual
handling and arrangement, this can help avoid the need for a
separate container such as a Petri dish.
[0083] FIG. 14D illustrates an alternate embodiment in which a
cylindrical filter 1284 is disposed around the aspiration tube
1286. In this alternative embodiment the larger filter 1292 (FIG.
14A) may be omitted. Another variant is a filter across the inlet
port of the aspiration tube. Other means for preventing tissue
samples from exiting the specimen holder might also be
employed.
[0084] FIGS. 15A and 15B illustrate a variant of the embodiments of
FIGS. 14A-14D in which an inlet port 1300 and outlet port 1302 are
integrated with a container 1304 (rather than the cap). A cap 1306
can be temporarily affixed to the container during use. The inlet
port is offset from the outlet port such that the inlet port is
higher than the outlet port when the container is upright. As shown
in FIG. 15B, samples 108 entering through the inlet port move
through a short interior channel and are deposited onto a ramp
1395, where bio-fluid drains away from the samples into the gutter
formed around the ramp. The fluid flows out of the outlet port,
which is disposed proximate to the level of the base of the
container. Samples are prevented from entering the outlet port by a
filter, e.g., a cylindrical filter 1392 or a filter panel 1394. The
assembly is radiolucent, and images may be acquired at regular
intervals or in response to a trigger condition, for example from
timing or a motion detector which detects movement of the cores
towards or through the inlet port. When the samples have been
imaged and the biopsy completed, either because a desired number of
samples has been excised, or because a sufficient number of
calcified samples have been detected, the specimen holder may be
removed from the RSC. In order to prepare the samples for transport
the container is inverted so that the samples fall away from the
ramp into the cap due to gravity or applied force. The cap should
have sufficient interior volume to accommodate the samples. A lid
1397 is then affixed to the cap in order to enclose the samples as
shown in FIG. 15C. Further, formalin could be added such that the
cap can serve as a specimen jar.
[0085] Another alternative embodiment of the specimen holder is
shown in FIGS. 16A, 16B, and 17A through 17C. A tissue tray 1402
with integral end cap 1400 fits into a containing cover 1401. In
particular, the specimen holder is assembled by sliding the tissue
tray 1402 into the cover 1401 until the end cap is seated against
an opening at one end of the cover. Both the tray and cover are
manufactured from radiolucent material, such as plastic or the
like. The cover 1401 is generally rectangular parallelepiped in
shape, comprising a pair of side walls coupled between base and top
walls, a distal wall and an opening. The integral end cap 1400 of
the tissue tray forms a proximal wall across the opening of the
cover when the specimen holder is assembled. An inlet port 1404 is
disposed in the distal wall of the cover. An outlet port 1406 is
disposed at a proximal portion of the cover. Retaining features
such as locking tabs 1410 are disposed on the end cap 1400 for
insertion into corresponding locking features 1412 disposed on the
outer surface of the cover. The retaining features secure the end
cap to the cover such that fluid leakage is inhibited when the
specimen holder is assembled. The tissue tray includes a base
member 1408, sidewalls extending upward from the base member, and a
notched endplate 1414 perpendicularly mounted thereon. The tissue
tray functions as a filter such that bio-fluid can drain away from
the tray for removal via the outlet port. The width dimensions
should also be such that tissue samples cannot pass through the gap
between the tissue tray and the cover or flow out of the outlet
port.
[0086] During a biopsy procedure tissue samples and bio-fluid enter
the specimen holder through the inlet port and are deposited in the
tissue tray. The base member of the tissue tray may include a drain
or filter for allowing fluid to drain away from the captured tissue
samples. Consequently, the specimen holder typically contains both
air and fluid during a biopsy, both of which flow as shown with
arrows 1416, 1418. After the biopsy procedure is complete the tray
is removed from the cover by disengaging the retaining features.
Analysis of the specimen could be conducted in an in-line type of
system as described in FIG. 2, or the tissue tray could be removed
and taken to an x-ray system (e.g. Mammography unit or RSC that is
not part of the biopsy system).
[0087] FIGS. 18A and 18B illustrate another embodiment of the
specimen holder. The illustrated specimen holder includes a
cylindrical container base 1631, a basket 1632 and a cover 1633. A
cylindrical stage member 1636 projects from the bottom of the base.
The mesh basket 1632 includes roughly cylindrical walls and a mesh
base which rests on the stage member. The stage member 1636 has a
smaller diameter than the base 1631, thereby forming an annular
gutter 1650 into which bio-fluid drained away from captured tissue
samples can be collected for removal via an outlet port. A
horizontal inlet port 1634 and a vertical outlet port 1635 are
incorporated into the cover. The outlet port 1635 includes a
tubular conduit and associated structure which, when the specimen
holder is assembled, extends into the annular gutter 1650. An
indent in the wall of the basket accommodates the outlet port 1635,
i.e., enabling the outlet port to extend into the annular gutter
1650. Tissue samples received at the inlet port are deposited into
the basket where they are captured. Bio-fluid is drained away from
the samples through the mesh base of the basket. The drained fluid
collects in the annulus and is removed via the outlet port either
through the mesh stage member or directly from the annulus. The
outlet port exits the specimen holder through the top of the
cover.
[0088] FIG. 19 illustrates an embodiment in which the cover 1700
includes a vertical inlet port 1702 and the basket 1704 includes
legs 1706. The basket includes a filter 1708, and is both
radiolucent and artifact-free. An outlet port 1710 is below the
filter. A gasket may be provided to form a seal between the basket
and cover when assembled. Tissue samples introduced via the inlet
port are captured in the basket. Bio-fluid is drained away from the
captured samples via the output port. Saline flow from the inlet
port combined with suction from the outlet port may help to
disperse samples across the filter, thereby facilitating
delineation of the samples during imaging. An optional cap may be
provided to stop fluid drainage through the filter if it is
desirable to disconnect the basket from the tubing, e.g., for
removal from the RSC.
[0089] It should be noted that the specimen holders described above
could be used as tissue collection filters 230 (FIG. 2). For
example, samples could be temporarily captured for imaging in one
embodiment of a specimen holder and captured for transport in the
same or another embodiment of a specimen holder.
[0090] FIGS. 20A through 20C illustrate an alternative embodiment
of the specimen holder in which captured samples are automatically
arranged for individual identification and matching with images.
When samples are randomly distributed within a specimen holder it
is sometimes difficult to match each particular sample with a
corresponding x-ray image or portion of an image. This can be
problematic if, for example, the operator wishes to separate a
subset of samples having calcifications. The illustrated specimen
holder includes a revolving cylinder 1800 fabricated of radiolucent
material with multiple sample containment chambers 1802 arranged in
a ring. Each chamber has an inlet and an outlet. The outlet is
covered by a mesh filter such that tissue samples do not traverse
the chamber but bio-fluid is drained away. An o-ring may be
disposed at the inlet of each chamber and at the perimeter of the
revolving cylinder to facilitate sealing against an inlet port of
the specimen holder, which could be loaded into the RSC. A tissue
sample excised with the biopsy device 212 (FIG. 2) travels through
tubing into the RSC and is captured in a chamber aligned with the
inlet port. The sample is then imaged and the specimen holder is
rotated to align an adjacent empty chamber with the inlet port. The
procedure is repeated when another sample is captured, although the
embodiment is not limited to one sample per chamber. The chambers
may be labeled, e.g., with a visual indication of order of capture
on the specimen holder, so that images can be matched to samples.
Furthermore, the samples need not be imaged individually, e.g., the
entire specimen holder could be imaged, including samples captured
in some or all of the chambers. Alternatively, the specimen holder
could simply be used for sample capture and/or storage.
Differential pressure detection mechanisms or other techniques
described above can be used to trigger image capture and rotation
of the cylinder such that an empty chamber is presented for storage
of a subsequently excised sample. Following biopsy, the specimen
holder is removed from the RSC. As shown in FIG. 20C the outer ring
of the cylinder may be detachable, e.g., with a joint at an
interface 1806 between adjacent chambers, so that the ring of
chambers may be unwound into a flat configuration 1804 for linear
presentation, which is advantageous for a typical radiograph.
[0091] FIGS. 20d, 20e and 20f illustrate a mechanism to synchronize
the biopsy device and tissue filter to enable tracking clock
position of cores. This enables collecting cores in a manner that
tracks the clock position from which each cores was obtained.
Currently, if a physician wants to do this, they collect one core
at a time and place it into a tray that is separated into clock
positions. Various mechanisms could be used to help synchronize a
filter 1850 and rotating part of a biopsy device 1852, including
but not limited to gears, belts, friction drive, sensors and
motors. In the illustrated example gearing maintains the filter in
position relative to the biopsy device. For example, a sample taken
at 12 o'clock is stored at 12 o'clock because of inlet 1845
position. Rotating the biopsy device 1852 such that the 1 o'clock
position rotates the filter such that the 1 o'clock slot is aligned
with the inlet port. Consequently, a sample taken at 1 o'clock is
stored at 1 o'clock. The positions are marked so that they can be
seen with the naked eye, analysis equipment, or both. Further, the
filter and device can be oriented in various ways, including but
not limited to side-by-side, vertical stacking, and integrating the
filter within the device. The filter can be disengaged from the
biopsy device and analyzed, or analyzed in the aforementioned
in-line approach.
[0092] FIGS. 21A and 21B illustrate an alternative revolving
cylinder specimen holder. In this embodiment the tissue sample
containment chambers are formed by inserting an interior wall
assembly 1900 into an outer cylindrical cup 1902. The interior wall
assembly includes a plurality of walls 1904 extending from a
central axis 1906. A distal edge of each wall relative to the
central axis forms a press or close fit against an inner surface of
the outer cup, e.g., such that the a tissue sample cannot pass
between the interior wall and the cup along the contact surface. At
least a portion of the wall assembly 1900 and/or the cylindrical
cup 1902 may be porous in nature to permit fluid flow while also
preventing traversal by tissue samples. A gear or knob 1910 may be
disposed at an end of the central axis of the interior wall
assembly to enable rotation of the specimen holder. A distal end of
the cup may include a grommeted hole 1912 with seal through which
the gear or knob extends upon assembly. The resulting rotating
specimen holder functions during biopsy in the manner described
above with regard to the embodiment of FIGS. 21A and 21B.
[0093] In a variation of the embodiment described above the
interior wall assembly 1900 is rotated while the outer cup 1902 is
held stationary. In this embodiment the fit between the interior
walls and the outer cup should exhibit less friction, although it
should also prevent presentation of gaps where a captured sample
might be caught during rotation. The bases of the outer cup
include, respectively, an inlet port 1914 and an outlet port 1916,
both of which are offset from the central axis. The bases may be
implemented with removable caps. As a sample enters a chamber it is
captured and imaged, following which the interior wall assembly is
rotated relative to the outer cup to present an adjacent empty
chamber to the inlet port. Imaging may be performed by positioning
the specimen holder such that the x-ray source is normal to the
proximal base of the specimen holder, and the detector is in a
position normal to the distal base of the specimen holder.
[0094] FIGS. 22A through 22D illustrate an alternative
compartmentalized specimen holder. This embodiment includes a base
container 2100 and a filter member 2102 characterized by a row of
tissue sample retention compartments. An outlet port 2104 is formed
in the base container and an inlet port 2108 is formed in an inlet
conduit 2106. The inlet conduit is inserted into the base container
through an opening that may include a seal. The seal permits the
inlet conduit to be slidably moved further into or out of the
interior volume of the base container without fluid leakage. Such
linear repositioning is employed to relocate the inlet port in
order to selectably deposit a tissue sample in a particular
compartment in the row. Operation of the inlet conduit may be
coordinated, and the containers marked, such that images can be
matched with associated samples.
[0095] All of the embodiments described herein that capture tissue,
can be used with or without an inline analysis system, such as that
described in FIG. 2. If an inline analysis system is not used, the
specimen holder, or a portion of, is removed from the biopsy device
after sufficient cores are gathered. The cores are then transported
for analysis on any other separate system for analysis (RSC,
Mammography unit, spectroscopy, MRI, etc). This may require that
the specimen holder or portion of is designed to reduce any
potential error in the analysis (e.g. radioluscent and homogenous
signal if X-ray is used, and saline is removed for X-ray). In
addition, the specimen holder of portion of can be capped and serve
to keep specimens separated from one another if applicable. If
multiple chambers are present in the holder or portion of, they can
be labeled to allow correlation to a labeled analysis result for
that particular chamber. This aids in communicating to the
pathologist or other which cores have an abnormality as determined
by the analysis.
[0096] FIG. 23 illustrates a multi-channel tissue sample sorting
system 2200. The system includes a plurality of sample distribution
tubes, such as tubes 2202 and 2204, each of which is coupled to a
main tube 2206 through which samples travel when exiting the
staging area of the RSC. Each distribution tube is coupled to a
separate specimen holder or filter/container 2214, 2216. The flow
of fluid and samples from the main tube into a particular
distribution tube is controlled by valves 2208, 2210, e.g., one
valve for each distribution tube, disposed proximate to where the
sorting tubes connect to the main tube. Pinch valves or similar
devices could be used, although the invention is not limited to any
particular type of valve. Tissue samples may be sorted on any
desired basis. For example, tissue samples may be sorted based on
detection of calcifications. In such an implementation a tissue
sample would be imaged in the staging area. The presence of
calcifications in the imaged sample could be determined either
manually, e.g., by viewing on a monitor and indicating a
determination via an interface, or automatically using a processor
2212 and Computer Assisted Detection (CAD) algorithms. The state of
one of the valves would then be automatically changed, e.g., opened
with a control signal, thereby allowing the sample to move out of
the staging area and into a container for samples with
calcifications or a container for samples lacking
calcifications.
[0097] FIG. 24 illustrates an alternative tissue sample sorting
system 2300. The system could be integrated with the RSC or
implemented as a separate system. In this embodiment a tissue
sample collector 2302 includes multiple receptacles 2304, 2306
which can be selectively aligned with a port 2308 in order to
deposit a tissue sample into an appropriate receptacle. A
multi-compartment rotating wheel assembly 2310 can be used to
facilitate depositing of the tissue sample in the appropriate
receptacle. For example, an imaged sample can be flushed from the
specimen holder in the RSC even before image analysis has been
performed. The flushed sample flows from the RSC into a compartment
2312 of the wheel assembly aligned with an inlet port 2314. The
wheel assembly is then rotated to prepare to receive a subsequent
sample. Once the sample has been processed to determine whether it
includes calcifications or some other characteristic, a sorting
controller 2316 receives tissue classification information from the
RSC and uses this information to selectively shift the tissue
sample collector 2302 into position such that the outlet port 2308
of the wheel assembly is aligned with the appropriate receptacle,
2304 or 2306. The wheel is then rotated until the compartment
containing the sample is aligned with the outlet port 2308, and the
sample is deposited in the appropriate receptacle. This
advantageously allows sample excision and imaging to continue even
if image processing is relatively slower because the tissue samples
are buffered in the wheel assembly between the specimen holder and
receptacles pending classification results. The wheel may be
implemented with a number of compartments calculated to enable a
full set of biopsy samples to be excised and imaged before sorting
occurs.
[0098] FIG. 25 illustrates a variation 2352 of the embodiment of
FIG. 24. In this variation a sample collector 2350 with multiple
compartments 2354, 2356 is moved rotationally rather than linearly
in order to selectively align a compartment with the outlet port
2358 of the wheel assembly. The illustrated cylindrical sample
collector includes a first compartment 2354 for storing tissue with
calcifications and a second compartment 2356 for storing tissue
samples without calcifications. The sorting control 2360 rotates
the cylinder in response to the tissue classification information
from the RSC. The system could be integrated with the RSC or
implemented as a separate system.
[0099] FIG. 26A illustrates use of a biopsy suite including aspects
of the invention. The biopsy device 212 is mounted below a biopsy
table 2500, such as the MultiCare.TM. Platinum prone breast biopsy
table provided by Hologic, Inc., Bedford Mass. The table includes
an x-ray source 2502 oriented normal to a detector 2504, and
rotatably mounted on a rotating c-arm 2506 for pivoting +/-15
degrees for capturing stereotactic images. Tubing couples the
biopsy device 212 to the RSC 220, which is shown to include an
integrated specimen holder for capturing tissue samples for the
purposes of imaging, and calcification detection, and
separation/sorting of tissue.
[0100] FIGS. 26B and 26C illustrate an alternate embodiment of the
biopsy suite. In this embodiment an x-ray source 2510 serves the
dual purpose of an x-ray source for stereotactic imaging, and as
the x-ray source for calcification visualization. The x-ray source
2510 is mounted on C-arm 2512, pivoting between a +/-15 degree
orientation for stereotactic localization of the lesion. Following
localization, the source is further pivoted away from the table and
coupled to an x-ray shield 2514. Mounted within the x-ray shield is
the tissue sample holder. During biopsy, tissue samples travel from
the needle to the tissue sample holder, where images are captured.
The x-ray shield enables passage of the x-rays through the tissue
samples while shielding the operator from exposure. Such an
arrangement may reduce the overall cost of a biopsy and
visualization system by reducing the number of x-ray sources.
[0101] Accordingly various components that may be included in a
real-time specimen radiography system have been shown and
described, including a RSC with mechanisms for determining when a
tissue sample is approaching or has arrived at a staging area,
mechanisms for automatically triggering image acquisition, specimen
holders capable of staging singular or multiple cores for imaging,
tissue sorting mechanisms with the capability of sorting tissue
samples using tissue classification information received from the
RSC and a display and user interface which allows the operator to
dynamically control image acquisition parameters, use CAD tools on
acquired images, manipulate and mark images in real time and
monitor status. The present invention removes or reduces the need
for manual manipulation of specimens from biopsy to placement in
formalin, thereby increasing the speed with which procedures can be
performed, potentially reducing the amount of tissue that needs to
be excised (as the medical professional will know when it has
excised appropriate tissue) and increasing the likelihood of
getting the target calcifications.
[0102] Additionally biopsy device adapted for use with a real-time
specimen radiography system has been shown and described and may
include a plurality of ports including vacuum port, saline line,
and optional additional vent port for venting a cannula of the
biopsy device to assist transport of excised tissue into the
staging area of the imaging device.
[0103] Although embodiments of the inventions have been described
in connection with radiographs, other analysis may include imaging
and non-imaging based analysis including but not limited to PET,
PEM, MRI, ultrasound, x-ray diffraction or any other analysis
method.
[0104] Although certain embodiments are described for capturing and
imaging multiple cores together, variations are contemplated. For
example, rather than taking one image of a group of cores it may be
desirable to obtain an image after each core is captured, or
alternatively after each n cores are captured. For example, an
image might be taken of a 1.sup.st core after it is captured, then
when a second core is captured a second image taken of the 1.sup.st
and 2.sup.nd cores, and so forth. It is also contemplated that the
system could be reconfigurable to implement any variant preferred
by the operator. This applies for specimen holders that separate
each core via multiple chambers and for specimen holders that catch
all specimens in one single chamber.
[0105] It should also be noted that the specimen holder and/or
filter could have some radiopaque markings on the periphery to aid
the user in correlating the image to the specimen chamber, e.g., to
pick out the cores with calcifications. For example, cores could be
separated into a multi chamber filter with markings A thru K (or
other markings) that are radiopaque and visible to the naked eye as
part of the specimen holder (e.g., Carousel or Linear). Saline is
automatically drained from cores and at least one radiograph taken.
A through K will be visible on radiographs corresponding to the
chambers. It is then easy for the operator to determine which
chambers have cores containing calcifications, remove the filter,
place a lid on filter, place into formalin, and mark which chambers
have calcifications on the label. This advantageously helps
communicate to the pathologist which cores have calcifications and
has utility independent of real time specimen radiography.
Alternatively, the tissue filter could be labeled and visible to
the naked eye (e.g. filter labeled 1 through 12), and another
feature of the filter (e.g. distinct notch, or other) could be used
by the analysis unit to track and label each analysis output to
correlate with the filter label (e.g. analysis output labeled 1
through 12)
[0106] With regard to the indexing features, it should be noted
that individual slots or chambers could be indexed manually or
automatically. For example, a motor and controller, or other energy
source (pneumatic, etc) could be used to move parts associated with
the specimen holder and/or input in order to achieve indexing.
Timing for indexing could be based on operator observation and
manual actuation (e.g. user rotates by hand), indirect manual
actuation (e.g., pushing a button that prompts an action), or
automated actuation, (e.g., geared to device rotation, timing from
console, pressure monitor, motion of cores).
[0107] The specimen holders and features associated therewith may
have utility apart from imaging systems. For example, indexing,
separation, marking, draining fluid and other functions provided by
the various specimen holder features described above are
advantageous apart from imaging. Further, specimen holders which
can be capped, function as a specimen jar or otherwise include a
part or parts that help avoid handling individual samples such as
covers which keep specimens in particular chambers are advantageous
apart from imaging. The cores should be easily removed and placed
into formalin after the procedure, e.g., a one handed, possibly
two-handed, procedure. It should be noted that many designs are 2
piece to facilitate a one handed procedure. One hand to grasp the
specimen holder, and the other hand to remove the tissue filter.
Further, the filter may be capable of being removed and placed on a
typical mammography system, or in a specimen radiograph system, and
be imaged, e.g., carousel design allows removal of filter that can
be placed on Mammography Unit for x-ray. It should be noted that
some designs intentionally keep the fluid lines in one part of the
specimen holder, such that the other part of the specimen holder
can be removed, house the cores, and facilitate transport.
[0108] The specimen holders may be characterized by features which
facilitate analysis and remove or reduce any potential error
induced by the holder. For example, radioluscent materials may be
used. Further, homogeneous wall thickness or volume.times.density
of each pixel across the specimen holder may be homogeneous. This
helps ensure that the specimen holder shows up as a homogenous area
of contrast on the X-ray image if imaged alone. It should also be
noted that certain embodiments avoid walls, ports, etc being in the
X-ray field of view.
[0109] As discussed above, venting cores increases the speed at
which they travel out of the biopsy system. Without venting, a
vacuum lock is created on the cavity side of the core, and the core
may stop moving. This vacuum lock can be relieved with saline
venting. The saline vent allows the core to move through the device
at a relatively slower pace which can be expedited by venting with
air instead of saline. The saline/vacuum system (from the saline
source to the cavity side of the core as it moves back to the
filter) can be opened to the atmosphere to move the core quickly,
i.e. air vent. If this is done, the core moves quickly and is
vented by atmosphere instead of saline. Thus, less saline or no
saline may be pulled from the bag while this vent to atmosphere is
open. However, the air vent may need to be closed prior to the next
biopsy cycle to rebuild vacuum levels. Alternatively, the air could
replace the saline source. Thus, all venting would be done by
atmosphere as opposed to saline or fluids.
[0110] Although stopping movement of tissue samples for imaging is
described, it is contemplated that a tissue sample could be slowed
for analysis or imaged without being slowed. For example, an image
or scan could be captured as tissue passes through a field of
view.
[0111] Although tubing is described for transporting tissue between
the biopsy device and the RSC it is contemplated that other means
could be utilized, e.g., mechanical systems such as a conveyor
belt, transported by withdrawing or moving the hollow cutting
cannula or the piercing cannula with core disposed within, using
pressure to drive the core out, etc, or combination of Similarly,
the invention is not limited to use with a vacuum.
[0112] Those skilled in the art will understand that features
described herein may be used in different combinations to produce
other embodiments. For example, any form of analysis might be used,
including but not limited to x-ray, MRI, PET, Ultrasound,
spectroscopy, X-ray diffraction, OCT, etc. Also, any means of
getting tissue form device to specimen holder may be used,
including but not limited to vacuum, conveyor belt, moving cannula
with tissue disposed within, etc or combination thereof. Tissue can
be artifact free for any imaging in area of analysis. For example,
for x-ray, radiolucent and artifact free in analysis area.
Embodiments could be used in line as described with RSC or with
external analysis unit, e.g., mammography unit. The entire specimen
holder could be removed and used e.g., capping the inlet and
outlet. It could also be filled with formalin. Also, a portion of
the specimen holder (tissue filter) could be removed. The specimen
holder could be capped to keep cores in their individual chambers.
Also, the specimen holder or filter may be designed to be placed in
formalin jar. The entire specimen holder could be analyzed, or a
small portion could be analyzed and then the holder could be
indexed to analyze the next region or chamber. Analysis could be
performed after each cycle, or after n cycles. The sequence of
events could be based on the presence of the core, or based on set
cycle time. Presence of the core could be detected by motion,
pressure differential, etc. Cycle time could be based on the biopsy
device and console. Events could include indexing the chamber,
imaging the core, controlling venting, releasing cores, etc. The
process could be automated, manual or hybrid manner. Similarly, the
chamber can be indexed in any manner, and imaging can be done and
cores could be moved in any manner. Further, any embodiment can
include features to remove liquid from the samples. Any filter
could be uniquely marked/identified to correlate with the analysis
images such that each analysis can be correlated to an individual
chamber. Markings could be radiopaque or non radiopaque. Markings
could be geometry based (nubs, etc). Venting with saline or air is
optional; either facilitate removal of the tissue. Air can expedite
the travel. Cores do not need to be stopped to be analyzed; they
could be scanned as they pass through. Designs can include features
to allow analysis substantialy free of artifacts, e.g.,
radioluscent materials, fluid drainage, homogenous wall thickness
or volume.times.density of each pixel across the specimen holder
may be homogeneous, avoidance of walls, ports, etc being in the
X-ray field of view.
[0113] While the invention is described through the above exemplary
embodiments, it will be understood by those of ordinary skill in
the art that modification to and variation of the illustrated
embodiments may be made without departing from the inventive
concepts herein disclosed. Moreover, while the preferred
embodiments are described in connection with various illustrative
structures, one skilled in the art will recognize that the system
may be embodied using a variety of specific structures.
Accordingly, the invention should not be viewed as limited except
by the scope and spirit of the appended claims.
* * * * *