System and method for spiral volume imaging

Patent metadata

Field	Value
Publication number	US-10527689-B2
Application number	US-201515125860-A
Country	US
Kind code	B2
Filing date	Mar 13, 2015
Priority date	Mar 14, 2014
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A system and method for system for performing a magnetic resonance imaging (MRI) process using an MRI system is provided. A coil system includes a substrate configured to follow a contour of a portion of a subject to be imaged by the MRI system and at least one coil coupled to the substrate and forming a spiral pattern.

First claim

The invention claimed is:

1. A magnetic resonance imaging (MRI) system, comprising:
a magnet system configured to generate a static magnetic field about at least a region of interest (ROI) of a subject arranged in the MRI system;
a plurality of gradient coils configured to establish at least one magnetic gradient field with respect to the static magnetic field;
a radio frequency (RF) system including a transmit and receive coil comprising:
a substrate configured to follow a contour of a portion of the subject to be imaged by the MRI system;
at least one coil coupled to the substrate and forming a hemispherical spiral pattern; wherein the hemispherical spiral pattern includes a distance between adjacent portions of the at least one coil that is uniform;
wherein the at least one coil is configured to originate and spiral out from a center point configured to be aligned with an apex of a crown of a head of the subject; and
wherein the at least one coil is further configured by spiraling out to encircle a perimeter of the head of the subject.

2. The MRI system of claim 1 wherein the static magnetic field is a low-field static magnetic field.

3. The MRI system of claim 1 wherein the static magnetic field is less than 10 mT.

4. The MRI system of claim 1 wherein the transmit and receive coil is sized to image a periphery of the subject.

5. The MRI system of claim 1 wherein the MRI system is configured to perform a pulse sequence to perform an imaging process and wherein the at least one coil is configured to perform transmit and receive operations during performance of the pulse sequence.

6. The MRI system of claim 5 wherein the pulse sequence includes a balance steady state free precession (b-SSFP) pulse sequence.

7. The MRI system of claim 1 wherein the substrate forms a helmet and the portion of the subject is the head, such that the helmet is configured to contour the head of the subject.

8. The MRI system of claim 1 wherein the substrate is formed of a material suitable for three-dimensional (3D) printing.

9. The MRI system of claim 1 wherein the hemispherical spiral pattern includes a plurality of spiral turns around the contour of the portion of the subject to be imaged and wherein a distance between adjacent spiral turns of the at least one coil is uniform.

10. A transmit and receive coil system for performing a magnetic resonance imaging (MRI) process using an MRI system, the coil system comprising:
a substrate configured to follow a contour of a portion of a subject to be imaged by the MRI system; and
at least one transmit and receive coil coupled to the substrate and forming a three-dimensional spiral pattern extending over the substrate; wherein the three-dimensional spiral pattern includes a distance between adjacent portions of the at least one coil that is uniform,
wherein the at least one transmit and receive coil is configured to originate and spiral out from a center point configured to be aligned on an apex of a crown of a head of the subject,
wherein the at least one transmit and receive coil is further configured by spiraling out to extend to encircle a perimeter of the head of the subject.

11. The transmit and receive coil system of claim 10 wherein the at least one coil is sized to image a periphery of the subject.

12. The transmit and receive coil system of claim 10 wherein the substrate forms a helmet and the portion of the subject is the head, such that the helmet is configured to contour the head of the subject.

13. The transmit and receive coil system of claim 10 wherein the substrate is formed of a material suitable for three-dimensional (3D) printing.

14. The transmit and receive coil system of claim 10 wherein the three-dimensional spiral pattern includes a plurality of spiral turns around the contour of the portion of the subject to be imaged and wherein a distance between adjacent spiral turns of the at least one coil is uniform.

15. A single channel radio-frequency coil configured for a portion of human anatomy, the single channel radio-frequency coil comprising:
a conductor arranged in a three-dimensional geometry about a region of interest, wherein the three dimensional geometry includes a distance between adjacent portions of the conductor that is uniform, and wherein, when the single channel radio-frequency coil is operated as a transmit and receive coil in conjunction with performing magnetic resonance of the portion of the human anatomy of a subject, the conductor is configured to produce and detect magnetic fields substantially parallel to a longitudinal axis of the subject's body,
wherein the conductor is configured to originate and spiral out from a center point configured to be aligned with an apex of a crown of a subject's head,
wherein the conductor is further configured by spiraling out to extend to encircle a perimeter of the subject's head.

16. The single channel radio-frequency coil of claim 15 , wherein the conductor is arranged in a substantially spiral geometry.

17. The single channel radio-frequency coil of claim 15 configured as a head coil comprising a substrate formed to accommodate the subject's head, wherein the conductor is arranged in the three-dimensional geometry over a surface of the substrate.

18. The single channel radio-frequency coil of claim 17 , wherein the conductor is arranged over at least a hemisphere of the substrate.

19. The single channel radio-frequency coil of claim 15 , wherein the conductor is formed by a wire arranged in the three-dimensional geometry.

20. The single channel radio-frequency coil of claim 19 , wherein the wire is a single-strand wire.

21. The single channel radio-frequency coil of claim 19 , wherein the wire is a Litz wire.

22. The single channel radio-frequency coil of claim 15 , wherein the conductor has a length greater than a meter.

23. The single channel radio-frequency coil of claim 22 , wherein the conductor has a length greater than 5 meters.

24. The single channel radio-frequency coil of claim 23 , wherein the conductor has a length greater than 10 meters.

25. The single channel radio-frequency coil of claim 15 , wherein the conductor is arranged in the three-dimensional geometry such that the conductor forms at least 10 turns.

26. The single channel radio-frequency coil of claim 15 , wherein the conductor is arranged in the three-dimensional geometry such that the conductor forms at least 20 turns.

27. The single channel radio-frequency coil of claim 15 , wherein the conductor is arranged in the three-dimensional geometry such that the conductor forms at least 30 turns.

28. The single channel radio-frequency coil of claim 15 , wherein the radio-frequency coil is configured to transmit and receive at frequencies corresponding to a B0 field of less than 0.2 T.

29. The single channel radio-frequency coil of claim 15 , wherein the conductor is arranged in the three-dimensional geometry such that the conductor forms a plurality of spiral turns around the region of interest and wherein a distance between adjacent spiral turns of the conductor is uniform.

Assignees

• Massachusetts Gen Hospital

Inventors

• Rosen Matthew S
• Sarracanie Mathieu
• Salameh Najat

Classifications

• G01R33/445

  MR involving a non-standard magnetic field B0, e.g. of low magnitude as in the earth's magnetic field or in nanoTesla spectroscopy, comprising a polarizing magnetic field for pre-polarisation, B0 with a temporal variation of its magnitude or direction such as field cycling of B0 or rotation of the direction of B0, or spatially inhomogeneous B0 like in fringe-field MR or in stray-field imaging · CPC title

• A61B5/08

  Measuring devices for evaluating the respiratory organs · CPC title

• G01R33/5601

  involving use of a contrast agent for contrast manipulation, e.g. a paramagnetic, super-paramagnetic, ferromagnetic or hyperpolarised contrast agent · CPC title

• G01R33/5635

  Angiography, e.g. contrast-enhanced angiography [CE-MRA] or time-of-flight angiography [TOF-MRA] · CPC title

• G01R33/34046 Primary

  Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils · CPC title