Magnetic resonance imaging system and method for determining the position of at least one coil in a magnetic resonance imaging

Patent metadata

Field	Value
Publication number	US-12178668-B2
Application number	US-202218046573-A
Country	US
Kind code	B2
Filing date	Oct 14, 2022
Priority date	Oct 19, 2021
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

At least one example embodiment provides a magnetic resonance imaging system comprising at least one local radiofrequency (RF) coil; and at least one marker element, wherein the magnetic resonance imaging system is configured to activate the at least one marker element and deactivate the at least one marker element such that the at least one marker element is detectable by the magnetic resonance imaging system at a position relative to the at least one local RF coil if the at least one marker element is activated, and the at least one marker element is not detectable by the magnetic resonance imaging system if the at least one marker element is deactivated.

First claim

We claim:

1. A magnetic resonance imaging system comprising:
at least one local radio frequency (RF) coil;
at least one marker element, the magnetic resonance imaging system is being configured to activate the at least one marker element and deactivate the at least one marker element such that
the at least one marker element is detectable by the magnetic resonance imaging system at a position relative to the at least one local RF coil based on the at least one marker element being activated, and
the at least one marker element is not detectable by the magnetic resonance imaging system based on the at least one marker element being deactivated; and

a shielding element, at least one of
(i) the shielding element being movable into a first shielding position and into a first non-shielding position, or
(ii) the at least one marker element being movable into a second shielding position and into a second non-shielding position,

wherein
the shielding element is configured to enclose the at least one marker element such that the at least one marker element is shielded from the magnetic resonance imaging system based on at least one of the shielding element being in the first shielding position or the at least one marker element being in the second shielding position, and
the shielding element is configured to be apart from the at least one marker element such that the at least one marker element is detectable by the magnetic resonance imaging system based on at least one of the shielding element being in the first non-shielding position or the at least one marker element being in second the non-shielding position.

2. The magnetic resonance imaging system of claim 1 , wherein the at least one marker element is a capsule containing a magnetic resonance visible fluid.

3. The magnetic resonance imaging system of claim 1 , wherein the shielding element is a tube.

4. The magnetic resonance imaging system of claim 1 , further comprising:
an air pressure chamber; and
a fluid conducting element connected to the air pressure chamber,
wherein
the shielding element and the at least one marker element are inside the air pressure chamber, and
the shielding element is movable by air pressure provided via the fluid conducting element.

5. The magnetic resonance imaging system of claim 1 , further comprising:
a cable mechanism configured to move the shielding element between the first shielding position and the first non-shielding position.

6. The magnetic resonance imaging system of claim 1 , further comprising:
an ultrasound emitter configured to provide ultrasound waves at the at least one marker element to deactivate the at least one marker element with the ultrasound waves.

7. The magnetic resonance imaging system of claim 1 , further comprising:
a cable mechanism configured to
activate the at least one marker element, and
deactivate the at least one marker element.

8. The magnetic resonance imaging system of claim 7 , further comprising:
a hauling mechanism configured to move the at least one marker element to activate the at least one marker element and deactivate the at least one marker element, the hauling mechanism being configured to move the at least one marker element at least one of
with respect to the at least one local RF coil, or
in and out of a detectable area of the magnetic resonance imaging system.

9. The magnetic resonance imaging system of claim 1 , further comprising:
a hauling mechanism configured to move the at least one marker element to activate the at least one marker element and deactivate the at least one marker element, the hauling mechanism being configured to move the at least one marker element at least one of
with respect to the at least one local RF coil, or
in and out of a detectable area of the magnetic resonance imaging system.

10. The magnetic resonance imaging system of claim 9 , wherein the hauling mechanism comprises:
a movable cable extending from the at least one local RF coil to an area outside of the detectable area, the at least one marker element being attached to the movable cable such that the at least one marker element is movable between the at least one local RF coil and the area outside of the detectable area via the movable cable.

11. The magnetic resonance imaging system of claim 1 , wherein
the at least one marker element comprises a magnetic resonance visible fluid; and
the magnetic resonance visible fluid has a magnetic resonance relaxation time below 1000 ms.

12. The magnetic resonance imaging system of claim 11 , further comprising:
a relocation system, the relocation system including:
a fluid conducting element containing the magnetic resonance visible fluid, the fluid conducting element including a first part and a second part, the first part being at the at least one local RF coil or within the at least one local RF coil, and the second part being outside of a detectable area of the magnetic resonance imaging system, and
a fluidic pump configured to move the magnetic resonance visible fluid between the first part and the second part.

13. The magnetic resonance imaging system of claim 11 , further comprising:
a cable mechanism configured to
activate the at least one marker element, and
deactivate the at least one marker element.

14. The magnetic resonance imaging system of claim 11 , further comprising:
a hauling mechanism configured to move the at least one marker element to activate the at least one marker element and deactivate the at least one marker element, the hauling mechanism being configured to move the at least one marker element at least one of
with respect to the at least one local RF coil, or
in and out of a detectable area of the magnetic resonance imaging system.

15. The magnetic resonance imaging system of claim 11 , further comprising:
a relocation system configured to
relocate the at least one marker element with respect to at least one of
the at least one local RF coil, or
the magnetic resonance imaging system,

deactivate the at least one marker element by removing the at least one marker element from at least one of
the at least one local RF coil, or
a field of view of the magnetic resonance imaging system, and

activate the at least one marker element by moving the at least one marker element.

16. The magnetic resonance imaging system of claim 15 , wherein the relocation system comprises:
a fluid conducting element containing the magnetic resonance visible fluid, the fluid conducting element including a first part and a second part, the first part being at the at least one local RF coil or within the at least one local RF coil, and the second part being outside of a detectable area of the magnetic resonance imaging system; and
a fluidic pump configured to move the magnetic resonance visible fluid between the first part and the second part.

17. The magnetic resonance imaging system of claim 16 , wherein
the at least one local RF coil includes at least one ceramic element around at least one electronic component of the at least one local RF coil;
the at least one ceramic element includes at least one fluid channel connected to the fluid conducting element;
the magnetic resonance visible fluid is a cooling fluid; and
the fluidic pump is configured to move the magnetic resonance visible fluid through the at least one fluid channel.

18. A magnetic resonance imaging system comprising:
at least one local radio frequency (RF) coil;
at least one marker element, the magnetic resonance imaging system being

Assignees

• Siemens Healthineers Ag

Inventors

• Sukkau Johann
• Matschl Volker
• Schroeter Steffen

Classifications

• G01R33/481

  MR combined with positron emission tomography [PET] or single photon emission computed tomography [SPECT] · CPC title

• G01R33/34 Primary

  Constructional details, e.g. resonators {, specially adapted to MR} · CPC title

• A61B5/055

  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title

• A61B2090/3958

  emitting a signal · CPC title

• A61B2090/3933

  Liquid markers · CPC title