U.S. patent application number 12/120856 was filed with the patent office on 2008-11-20 for arrangement for affixing a magnetic resonance rf coil to a patient.
Invention is credited to Jan Bollenbeck, Wolfgang Renz.
Application Number | 20080287775 12/120856 |
Document ID | / |
Family ID | 39941950 |
Filed Date | 2008-11-20 |
United States Patent
Application |
20080287775 |
Kind Code |
A1 |
Bollenbeck; Jan ; et
al. |
November 20, 2008 |
ARRANGEMENT FOR AFFIXING A MAGNETIC RESONANCE RF COIL TO A
PATIENT
Abstract
In an arrangement to affix RF coils (in particular local coils)
on a patient in examinations with a magnetic resonance apparatus,
using a horizontal board to accommodate the patient for a magnetic
resonance examination to be implemented; with the RF coil that has
coil electronics; a fastening strap is fashioned to affix the coil
on the patient and the fastening strap has an connection cable
integrated therewith. The coil electronics are supplied with energy
via the integrated connection cable.
Inventors: |
Bollenbeck; Jan;
(Eggolsheim, DE) ; Renz; Wolfgang; (Erlangen,
DE) |
Correspondence
Address: |
SCHIFF HARDIN, LLP;PATENT DEPARTMENT
6600 SEARS TOWER
CHICAGO
IL
60606-6473
US
|
Family ID: |
39941950 |
Appl. No.: |
12/120856 |
Filed: |
May 15, 2008 |
Current U.S.
Class: |
600/422 |
Current CPC
Class: |
G01R 33/34084 20130101;
G01R 33/36 20130101; G01R 33/28 20130101; G01R 33/3415 20130101;
G01R 33/34007 20130101 |
Class at
Publication: |
600/422 |
International
Class: |
A61B 5/055 20060101
A61B005/055 |
Foreign Application Data
Date |
Code |
Application Number |
May 16, 2007 |
DE |
10 2007 023 028.3 |
Claims
1. An arrangement to affix an RF coil on a patient for a magnetic
resonance examination using the RF coil, comprising: a board
configured to receive a patient thereon in a prone position for
implementing a magnetic resonance examination of the patient; an RF
coil for use in said magnetic resonance examination, said coil
having coil electronics physically associated therewith; a
fastening strap connected to the coil to affix the coil on the
patient on the board; and a connection cable connected to said coil
electronics for supplying power to said coil electronics, said
connection cable being integrated with said fastening strap.
2. An arrangement as claimed in claim 1 comprising a latch
connection that connects said fastening strap to said board.
3. An arrangement as claimed in claim 2 wherein said latch
connection comprises electrical contacts integrated therein.
4. An arrangement as claimed in claim 3 wherein said contacts are
galvanic contacts.
5. An arrangement as claimed in claim 1 wherein said connection
cable integrated with said fastening strap is connected with said
RF coil via an electrical connection selected from the group
consisting of a galvanic connection, inductive coupling elements
and capacitive coupling elements.
6. An arrangement as claimed in claim 1 wherein said connection
cable or said fastening strap comprises a signal coupler integrated
therewith for transferring electrical signals between the RF coil
and the connection cable.
7. An arrangement as claimed in claim 6 wherein said integrated
signal coupler is a signal coupler selected from the group
consisting of capacitive couplers and inductive couplers.
8. An arrangement as claimed in claim 7 wherein said RF coil has a
housing comprising a coupler counterpart connected to the signal
coupler to transfer signals between the RF coil and the signal
coupler.
9. An arrangement as claimed in claim 8 comprising a fastening
strap guide, and wherein said coupler counterpart is located below
said fastening strap guide and is pressed by the fastening strap
onto the signal coupler.
10. An arrangement as claimed in claim 1 wherein said RF coil is
configured as a local coil.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention concerns an arrangement to affix an RF
coil, in particular a local coil, on a patient for an examination
with a magnetic resonance apparatus.
[0003] 2. Description of the Prior Art
[0004] In a magnetic resonance examination, RF coils (in particular
local coils) required to examine a patient are fastened on his body
with the aid of straps or belts. Coils known as "under-coils" are
placed on the horizontal board and have a rigid housing that is
fashioned to accommodate the patient's weight. Coils known as
"over-coils" are placed on the patient and are affixed on the body
of the patient and on the horizontal board with the aid of
fastening straps.
[0005] FIG. 2 shows such a magnetic resonance examination. A local
coil LS is fastened or, affixed on the body of a patient P with the
aid of a fastening strap BG. The local coil LS or its coil
electronics module is electrically supplied via a relatively thick
connection cable AK.
[0006] The connection cable AK is difficult to handle in
combination with the local coil LS due to a (generally) large
connection plug AS and interferes both during the examination and
during the examination preparation.
[0007] Due to the necessity of connecting and disconnecting the
connection plug AS before and after the examination, problems can
occur in the reliability of the electrical connection via the
connection plug AS.
[0008] In addition to the actual power supply of the coil
electronics, the signal transfer from or to the local coil
conductor also occurs via the connection cable AK.
[0009] At present concepts are under discussion to achieve the
signal transmission wirelessly or with the use of optical fibers.
Even with these concepts, however, it is still necessary to ensure
the power supply to the coil electronics.
SUMMARY OF THE INVENTION
[0010] An object of the present invention is to provide an
arrangement to affix RF coils of a general type (but in particular
local coils) on a patient in examinations with a magnetic resonance
apparatus, which arrangement is improved with regard to
handling.
[0011] This object is achieved in accordance with the invention by
arrangement to affix RF coils on a patient in examinations with a
magnetic resonance apparatus, wherein a horizontal board is used
that serves to accommodate the patient for a magnetic resonance
examination to be implemented.
[0012] Furthermore, at least one RF coil for the magnetic resonance
examination is provided, the coil having coil electronics. The coil
is affixed on the patient with the use of a fastening strap.
[0013] A connection or supply cable is an integrated part of the
fastening strap via which the coil electronics are supplied with
energy.
[0014] The necessity of the conventional, separate direction of the
connection cable is foregone by the inventive combination of the
fastening strap with the connection cable, such that the handling
of the local coil with the connected supply or connection cable is
made easier.
[0015] This is particularly advantageous in the use of multi-coil
combinations given known as "body array" coils, and in the use of
coils for angiography in the leg region, which are known as PAA
coils.
[0016] In a preferred embodiment, fastening straps that can be
fastened laterally at the horizontal board with a latching function
(comparable to locking a seat belt in a vehicle) are used in the
inventive arrangement.
[0017] Given the use of such fastening straps, electrical contracts
are integrated within the mechanically designed latch
connection.
[0018] Galvanically designed contacts can be used, or the
electrical supply of the coils can ensue via inductive or
capacitive coupling, comparable to charging devices that charge the
batteries of an electrically operated toothbrush via coupling.
[0019] In another embodiment, the fastening strap contains
capacitively or inductively designed signal couplers via which
acquisition signals of the coils or local coils can be extracted.
In this case a coupler counterpart is arranged on the top side of a
coil housing, preferably below a fastening strap guide.
[0020] Due to low electrical requirements for the power supply, if
such signals couplers are used it is possible to execute the
connection plugs very simply. The operation of the connections is
therefore further simplified.
[0021] In a preferred embodiment, the integrated connection cable
is additionally used for data or measurement signal transfer of
acquisition signals of the coils or local coils.
[0022] In a preferred development, data signals (that can be
selected via filters in the individual coil housings) are then
superimposed on the supply current.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] FIGS. 1A and 1B show an embodiment of the incentive
arrangement for use in a magnetic resonance examination.
[0024] FIG. 2 illustrates the prior art described in the
introduction in a magnetic resonance examination.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0025] FIG. 1A shows the inventive arrangement for use in a
magnetic resonance examination of a patient P.
[0026] A local coil LS1 is fastened or affixed on the body of the
patient P with the aid of a fastening strap BG1. The local coil LS1
or its coil electronics is electrically supplied via a connection
cable AK1.
[0027] The connection cable AK1 is an integrated part of the
fastening strap BG1 or is connected with the fastening strap BG1
for guidance.
[0028] For example, it can be arranged within a fastening strap
(not shown here) designed with a tube shape or, as shown here, it
is connected with the fastening strap with the aid of loops that
are components of the fastening strap BG1. Both the fastening strap
BG1 and the connection cable AK1 are thus directed together.
[0029] The electrical supply of the local coil LS1 (more precisely
of its coil electronic) here ensues via galvanically designed
contacts with the use of a connection plug AS1.
[0030] FIG. 1B shows further details of the invention with
reference to FIG. 1A.
[0031] The fastening strap BG1 is laterally fastened on a
horizontal board LB1 with a latch connection RV1 that has a
latching function comparable to the catch of a safety belt in a
vehicle.
[0032] The mechanically designed latch connection RV1 moreover has
additional electrical contacts K1 (not shown in detail here) via
which the power supply of the connection cable AK1 can ensue via
the horizontal board LB1.
[0033] The electrical supply of the local coil LS1 here ensues via
galvanically designed contacts with the use of the connection plug
AS1.
[0034] As an alternative, the power supply of the coil electronics
of the local coil LS1 can also ensue using inductive or capacitive
couplers (not shown here in detail). These couplers are designed
comparable to charging devices that charge batteries of an
electrically operated toothbrush via coupling.
[0035] In a further embodiment, the fastening strap BG1
additionally contains an integrated signal coupler KS1 that is
capacitively or inductively designed.
[0036] Acquisition signals of the local coil LS1 are injected from
the local coil LS1 into the connection cable AK1 via this signal
coupler KS1.
[0037] A coupler counterpart (covered by the signal coupler KS1 and
therefore not shown in detail) is arranged on the top side of a
coil housing.
[0038] The coupler counterpart is preferably arranged below a
fastening strap guide such that the coupler counterpart is
mechanically pressed onto the signal coupler KS1 by the fastening
strap BG1.
[0039] The transfer of the acquisition signals of the local coil
LS1 to the signal coupler KS1 of the fastening strap BG1 ensues via
this coupler counterpart.
[0040] Although modifications and changes may be suggested by those
skilled in the art, it is the intention of the inventors to embody
within the patent warranted hereon all changes and modifications as
reasonably and properly come within the scope of their contribution
to the art.
* * * * *