Magnetic field monitoring probe, magnetic resonance imaging apparatus including the same, and method for controlling the same

Patent metadata

Field	Value
Publication number	US-10247794-B2
Application number	US-201715461632-A
Country	US
Kind code	B2
Filing date	Mar 17, 2017
Priority date	Mar 17, 2016
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A magnetic field monitoring probe includes a first container having a sample configured to emit a magnetic resonance (MR) signal included therein; a radio frequency (RF) coil inserted into the first container and configured to receive an MR signal emitted from the sample; and a second container surrounding the first container and having a matching liquid injected thereinto.

First claim

What is claimed is:

1. A magnetic field monitoring probe comprising:
a first container having a sample configured to emit a magnetic resonance (MR) signal included therein;
a radio frequency (RF) coil inserted into the first container and configured to receive an MR signal emitted from the sample; and
a second container surrounding the first container and having a matching liquid injected thereinto.

2. The magnetic field monitoring probe of claim 1 , wherein the first container and the second container are implemented in a spherical shape or a cylindrical shape.

3. The magnetic field monitoring probe of claim 1 , wherein the RF coil is fixed to be placed at a center inside the first container by an insertion wire connected to the RF coil.

4. The magnetic field monitoring probe of claim 1 , wherein the sample provided in the first container corresponds to any one of water, heavy water, and fluorine in a liquid state.

5. The magnetic field monitoring probe of claim 1 , wherein a liquid that emits the MR signal at a resonance frequency different from the sample or does not emit the MR signal is the matching liquid.

6. The magnetic field monitoring probe of claim 1 , wherein the matching liquid is comprised of a heavy water in a liquid state.

7. The magnetic field monitoring probe of claim 1 , wherein the RF coil comprises a solenoid disposed at a center inside the first container.

8. A magnetic resonance imaging (MRI) apparatus comprising:
a static magnetic field generator configured to form a static magnetic field;
a gradient magnetic field generator configured to form a gradient magnetic field by applying a gradient to the static magnetic field;
a radio frequency (RF) coil portion configured to radiate an RF signal;
a magnetic field monitoring probe including a first container having a sample configured to receive the RF signal and emit an MR signal injected thereinto and a second container surrounding the first container, and configured to receive the MR signal emitted from the sample through an RF coil inserted into the first container; and
a controller configured to monitor one or more of states of the static magnetic field and the gradient magnetic field based on the received MR signal and perform a correction process based on a monitoring result.

9. The MRI apparatus of claim 8 , wherein a matching liquid for magnetic susceptibility matching is injected into the second container of the magnetic field monitoring probe.

10. The MRI apparatus of claim 8 , wherein the controller generates a corrected current pulse on the basis of the monitoring result and controls a gradient magnetic field to be formed based on the generated current pulse.

11. A method of manufacturing a magnetic field monitoring probe, the method comprising:
injecting a sample configured to emit a magnetic resonance (MR) signal, into a first container;
dipping a radio frequency (RF) coil configured to receive an MR signal emitted from the sample, in the first container; and
injecting a matching liquid into a second container surrounding the first container.

12. The method of claim 11 , wherein the dipping includes connecting an insertion wire to the RF coil to fix the RF coil to be placed at a center inside the first container.

13. The method of claim 11 , wherein the injecting the matching liquid into the second container includes selecting any one of liquids that emits the MR signal at a resonance frequency different from the sample or does not emit the MR signal as the matching liquid, and injecting the selected matching liquid into the second container.

Assignees

• Samsung Electronics Co Ltd
• Univ Industry Cooperation Group Kyung Hee Univ

Inventors

• Kim Young Tae
• Michel Eric
• Lee Soo Yeol

Classifications

• G01R33/3802

  Manufacture or installation of magnet assemblies; Additional hardware for transportation or installation of the magnet assembly or for providing mechanical support to components of the magnet assembly · CPC title

• G01R33/30

  Sample handling arrangements, e.g. sample cells, spinning mechanisms · CPC title

• G01R33/385 Primary

  using gradient magnetic field coils · CPC title

• G01R33/34007 Primary

  Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system · CPC title

• G01R33/56572

  caused by a distortion of a gradient magnetic field, e.g. non-linearity of a gradient magnetic field (G01R33/56509, G01R33/56518, G01R33/56536 take precedence) · CPC title