Identifying the static position of transmission/reception coils of a magnetic resonance imaging scanner with the aid of electronically readable labels

Patent metadata

Field	Value
Publication number	US-9547055-B2
Application number	US-201313974609-A
Country	US
Kind code	B2
Filing date	Aug 23, 2013
Priority date	Aug 23, 2012
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

A device for identifying a position of a local coil of a magnetic resonance imaging scanner relative to a position of a patient couch includes at least one label configured to transmit a signal with at least one identity number wirelessly, and at least one reading unit with a reading-unit antenna. The at least one reading unit is configured to receive the signal. The device also includes a position determination apparatus configured to determine the position of the local coil relative to the patient couch.

First claim

The invention claimed is:

1. A device for identifying a position of a local coil of a magnetic resonance imaging scanner relative to a position of a patient couch, the device comprising:
at least one label that is configured to transmit a signal with at least one identity number wirelessly;
at least one reading unit comprising a reading-unit antenna, the at least one reading unit being configured to receive the signal; and
a position determination apparatus that is configured to determine the position of the local coil relative to the patient couch.

2. The device as claimed in claim 1 , wherein the position determination apparatus is configured to determine the position of the local coil relative to the position of the patient couch while the patient couch is static, unmoved, or static and unmoved relative to a housing of a magnetic resonance imaging (MRI) scanner, while the patient couch is still situated outside of the MRI scanner, or a combination thereof.

3. The device as claimed in claim 1 , wherein the reading-unit antenna is arranged on the local coil and the at least one label is arranged on a patient table, the reading-unit antenna is arranged on the patient table and the at least one label is arranged on the local coil, or a combination thereof.

4. The device as claimed in claim 1 , wherein the position determination apparatus is configured to determine the position of the local coil relative to the position of the patient couch based on a position of the reading-unit antenna, a position of the at least one label on the local coil, or a combination thereof.

5. The device as claimed in claim 1 , wherein the position of the local coil relative to the reading-unit antenna, relative to the at least one label on the reading-unit antenna, or a combination thereof is determinable by a database based on the at least one identity number transmitted by the at least one label.

6. The device as claimed in claim 1 , wherein the position determination apparatus is configured to determine the position of the local coil relative to the patient couch taking into account a signal strength, presence of a reception of the signal received from the reading-unit antenna, or a combination thereof.

7. The device as claimed in claim 1 , wherein the position determination apparatus is configured to determine the position of at least the local coil relative to the patient couch taking into account a signal strength, presence of a reception of signals received from a plurality of reading-unit antennas, the signals comprising the signal, the plurality of reading-unit antennas comprising the reading-unit antenna.

8. The device as claimed in claim 1 , wherein a plurality of reading-unit antennas are arranged on the local coil, a plurality of labels are arranged on a patient table, or a combination thereof, the plurality of reading-unit antennas comprising the reading-unit antenna, the plurality of labels comprising the at least one label.

9. The device as claimed in claim 1 , wherein a plurality of reading-unit antennas are arranged on a patient table, a plurality of labels are arranged on the local coil, or a combination thereof, the plurality of reading-unit antennas comprising the reading-unit antenna, the plurality of labels comprising the at least one label.

10. The device as claimed in claim 1 , wherein each label of the at least one label is configured to transmit the at least one identity number, is readable wirelessly by the at least one reading unit, or a combination thereof.

11. The device as claimed claim 1 , wherein each label of the at least one label is an RFID label that transmits an RFID signal, and
wherein each reading unit of the at least one reading unit is an RFID reading unit.

12. The device as claimed in claim 1 , wherein the at least one reading unit comprises only one reading unit.

13. The device as claimed in claim 1 , further comprising a control configured to determine a position of one or more labels relative to one or more reading-unit antennas.

14. The device as claimed in claim 1 , wherein at least one ID number is stored in each label of the at least one label, the at least one ID number being stored in no other label of the at least one label.

15. The device as claimed in claim 1 , wherein the at least one reading unit is configured to establish at least a position of the at least one label on the local coil, to which the at least one label is attached, with the at least one identity number of the at least one label read by the reading unit using a database.

16. The device as claimed in claim 1 , wherein one or more labels are attached to a housing of a local coil arrangement or the local coil, are integrated into the housing of the local coil arrangement or the local coil, or a combination thereof.

17. The device as claimed in claim 1 , wherein one or more reading units, reading antennas, or the one or more reading units and the reading antennas are attached to a stationary part of the patient couch, in a spinal column coil arrangement positioned in a stationary manner in the patient couch, or a combination thereof.

18. The device as claimed in claim 1 , wherein a local coil not plugged onto the patient couch is detectable, the detection comprising a comparison of each plugged-in local coil detected at an interface on the patient couch with local coils detected on the basis of identity numbers received from labels.

19. The device as claimed in claim 1 , wherein the reading-unit antenna of the at least one reading unit and the at least one label are situated outside of a field of view of the MRI scanner during detection of the at least one label by the at least one reading unit.

20. The device as claimed in claim 1 , wherein the local coil is arranged in an unfixed fashion, a movable fashion, a non-integrated fashion, or a combination thereof on a patient table.

21. The device as claimed in claim 1 , wherein the local coil is a local coil arrangement, a local coil array, or a local coil arrangement and local coil array.

22. A method for identifying a position of a local coil of a magnetic resonance imaging (MRI) scanner relative to the position of a patient couch, the method comprising:
receiving, by at least one reading-unit antenna of a reading unit, an identity number transmitted wirelessly by at least one label;
determining, with a position determination apparatus, a position of the at least one label relative to the at least one reading-unit antenna, and the position of the local coil of the MRI scanner relative to the position of the patient couch.

23. The method as claimed in claim 22 , wherein determining the position of the local coil of the MRI scanner relative to the position of the patient couch comprises determining the position of the local coil relative to the position of the patient couch when the patient couch is still situated outside of the MRI scanner, immobile or static relative to the MRI scanner.

24. The method as claimed in claim 22 , wherein reading-unit antennas are arranged on the local coil and labels are arranged on a patient table, the reading-unit antennas are arranged on the patient table and the labels are arranged on the local coil, or a combination thereof.

Assignees

• Biber Stephan
• Metz Gerhard
• Siemens Ag

Inventors

• Biber Stephan
• Metz Gerhard

Classifications

• G01R33/3692

  involving signal transmission without using electrically conductive connections, e.g. wireless communication or optical communication of the MR signal or an auxiliary signal other than the MR signal · CPC title

• G01R33/3415

  comprising arrays of sub-coils {, i.e. phased-array coils with flexible receiver channels} · CPC title

• G01R33/3664 Primary

  Switching for purposes other than coil coupling or decoupling, e.g. switching between a phased array mode and a quadrature mode, switching between surface coil modes of different geometrical shapes, switching from a whole body reception coil to a local reception coil or switching for automatic coil selection in moving table MR or for changing the field-of-view (G01R33/3671 takes precedence) · CPC title

• G01R33/36 Primary

  Electrical details, e.g. matching or coupling of the coil to the receiver · CPC title