Apparatus and method for rapid and comfortable magnetic imaging of breast tissues, with cultural sensitivity

Patent metadata

Field	Value
Publication number	US-11378632-B2
Application number	US-201715431180-A
Country	US
Kind code	B2
Filing date	Feb 13, 2017
Priority date	Feb 17, 2016
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

Disclosed embodiments provide an apparatus and method for imaging breast tissue of a subject, wherein a subject is positioned on a structure so that at least a portion of the subject's body is supported by the structure, magnetic resonance imaging is performed on the portion of the subject's body using an MRI system including a plurality of MRI coils positioned in proximity to the structure, wherein, while the portion of the subject's body is positioned upon the structure, breast tissue of the subject's body is compressed in the proximity of plurality of MRI coils.

First claim

The invention claimed is:

1. An apparatus for imaging breast tissue of a subject, the apparatus comprising:
structure upon which at least a portion of the subject's body is positioned;
a magnetic resonance imaging system including a plurality of electro-permanent magnets positioned in a proximity of within 15 cm to the structure,
wherein, while the portion of the subject's body is positioned upon the structure, breast tissue of the subject's body is compressed in the proximity of at least one of the electro-permanent magnets with no external pressure applied, the MRI system is configured to control an amount of remanent magnetization of the electro-permanent magnets and image at least one microcalcification in the breast tissue,
wherein the magnetic resonance imaging system is single-sided, and
wherein the structure is further configured to accommodate the subject positioned seated upon the structure with bended knees during the imaging while the breast tissue is compressed on the structure.

2. The apparatus of claim 1 , wherein magnetic gradient pulses are generated to segment signals from the at least one microcalcification within the breast tissue.

3. The apparatus of claim 1 , wherein the pixel size of images obtained with the apparatus is less than 50 microns.

4. The apparatus of claim 1 , wherein the apparatus is configured to image the subject when a fabric is present between the breast tissue and the MRI system.

5. The apparatus of claim 1 , wherein the electro-permanent magnets are rapidly demagnetized in the case of nearby ferromagnetic materials as detected by the MRI system.

6. The apparatus of claim 1 , wherein the magnetic resonance imaging system generates magnetic gradient pulses with rise or fall-times that are less than 10 microseconds.

7. A method for imaging breast tissue of a subject, the method comprising:
positioning at least a portion of the subject's body on a structure to compress the portion of the subject's body on the structure via gravity with no external pressure applied;
imaging at least one microcalcification in breast tissue of the subject's body using a magnetic resonance imaging system including a plurality of electro-permanent magnets, the MRI system configured to control an amount of remanent magnetization of the electro-permanent magnets,
wherein at least one of the electro-permanent magnets is positioned in a proximity of within 15 cm to the structure,
wherein the magnetic resonance imaging system is single-sided, and
wherein the subject's knees are bent and the subject is seated during the imaging while the breast tissue is compressed on the structure.

8. The method of claim 7 , wherein the pixel size of images obtained by the imaging is less than 50 microns.

9. The method of claim 7 , wherein an examination is completed in 10 seconds or less.

10. The method of claim 7 , wherein the subject wears clothing positioned between the breast tissue and the MRI system during an examination with the MRI system.

11. The method of claim 7 , wherein a static magnetic field is rapidly diminished in the case where nearby ferromagnetic materials are detected by the MRI system.

12. The method of claim 7 , wherein the magnetic resonance imaging system generates magnetic gradient pulses with rise or fall-times that are less than 10 microseconds.

13. The method of claim 7 , wherein the imaging the at least one microcalcification comprises segmentation of the at least one microcalcification.

Assignees

• Weinberg Medical Physics Inc

Inventors

• Weinberg Irving N
• Nacev Aleksandar Nelson

Classifications

• A61B5/055

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

• A61B5/708

  Breast positioning means · CPC title

• G01R33/381

  using electromagnets · CPC title

• G01R33/288

  Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room · CPC title

• G01R33/3415 Primary

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