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MRI imaging system using permanent magnet array

An imaging system, a technology of permanent magnets, applied in the direction of using nuclear magnetic resonance imaging system for measurement, magnetic variable measurement, and nuclear magnetic resonance for analysis, etc.

Inactive Publication Date: 2019-01-11
CLEAR CUT MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, surgeons avoid resection of unnecessarily large tissue volumes as this can negatively affect cosmetic results

Method used

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  • MRI imaging system using permanent magnet array
  • MRI imaging system using permanent magnet array
  • MRI imaging system using permanent magnet array

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] now refer to figure 1 , which illustrates a tissue imaging system 10 constructed and operative in accordance with one non-limiting embodiment of the present invention.

[0023] The system 10 includes a fixed magnet array 12 arranged to generate a main magnetic field, which is a static magnetic field (B 0 ). The direction of the main magnetic field is indicated by arrow 13 . While the invention may be practiced with any kind of magnet, such as an electromagnetic element or a combination of permanent and superconducting magnets, in a preferred embodiment, magnet 12 is a permanent magnet such as, but not limited to, iron or rare earth (e.g., neodymium- iron-boron or samarium-cobalt) or combinations thereof, with or without a core of magnetic material. In one embodiment, magnet 12 is a permanent magnet whose magnetic field can be shaped from a material such as Mu metal (a nickel-iron soft magnetic alloy) cored by other magnetic materials (eg, a soft magnetic material suc...

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PUM

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Abstract

A tissue imaging system (10) includes a stationary array of magnets (12) arranged to generate an inhomogeneous main magnetic field (B0), a tissue holder (16) adjacent the array of magnets (12) and operative to move tissue (14) placed therein about and / or along a coordinate axis, one or more RF receive coils (20) adjacent the tissue holder (16) and the magnets (12), and an MRI processor in communication with the magnets (12), the RF receive coils (20) and the tissue holder (16). An image of the tissue (14) is created by using spatial encoding of magnetic resonance signals generated by the magnets (12) and RF receive coils (20) for different spatial orientations of the tissue (14) moved by the tissue holder (16) with respect to the magnets. Spatial inhomogeneities in the main magnetic fieldspatially modulate a phase of each of the magnetic resonance signals.

Description

technical field [0001] The present invention relates generally to devices and methods for imaging tissue, such as resected tumors or other tissue, and more particularly to magnetic resonance imaging (MRI) systems that use permanent magnets as the main magnetic field to image tissue. Background technique [0002] Breast cancer is usually treated with surgery, and then possibly chemotherapy or radiation therapy, or both. There are two types of surgery: mastectomy (removal of the entire breast) and lumpectomy (removal of only the lump). Lumpectomy is by far the most common treatment, suitable for at least 60% of women with breast cancer. [0003] It is important during a lumpectomy to remove all the cancerous tissue to minimize the risk of the cancer coming back. However, surgeons avoid removing unnecessarily large tissue volumes, as this can negatively affect cosmetic results. To verify that all cancerous tissue has been removed, a pathological examination of the lump is pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08G01R33/30G01R33/383G01R33/48
CPCG01N24/08G01R33/307G01R33/48G01R33/383G01R33/387
Inventor 摩西·夏皮罗
Owner CLEAR CUT MEDICAL