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A magnetic resonance radio frequency coil adjustment method, magnetic resonance scanning system and medium

A technology of radio frequency coil and adjustment method, which is applied in the directions of using nuclear magnetic resonance image system for measurement, magnetic resonance measurement, and magnetic variable measurement, which can solve the problems that decoupling cannot be achieved by decoupling methods, achieve fast calculation speed, and enhance image information. Noise ratio, effect of improving decoupling efficiency

Active Publication Date: 2019-12-03
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a magnetic resonance radio frequency coil adjustment method, a magnetic resonance scanning system and a medium, and solves the problem that the current decoupling method cannot achieve decoupling at any position

Method used

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  • A magnetic resonance radio frequency coil adjustment method, magnetic resonance scanning system and medium
  • A magnetic resonance radio frequency coil adjustment method, magnetic resonance scanning system and medium
  • A magnetic resonance radio frequency coil adjustment method, magnetic resonance scanning system and medium

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Effect test

Embodiment 1

[0054] figure 1 It is a flow chart of a magnetic resonance radio frequency coil adjustment method provided by Embodiment 1 of the present invention. The technical solution of this embodiment may be applicable to the decoupling of the magnetic resonance coil unit. The method specifically includes the following operations:

[0055] S110. Acquire a radio frequency signal received by a magnetic resonance radio frequency coil, where the radio frequency coil includes a plurality of radio frequency coil units.

[0056] Radio frequency coils are widely used in nuclear magnetic resonance, and can be divided into flexible coils and fixed shell coils. Compared with fixed shell coils, flexible coils have the advantages of flexible use scenarios, tight coil fit, and high signal-to-noise ratio. figure 2It is a structural schematic diagram of a flexible coil, wherein the flexible coil 10 includes a plurality of coil units 11 arranged in an array. Multiple flexible coils can also be used...

Embodiment 2

[0064] image 3 It is a flowchart of a method for adjusting a magnetic resonance radio frequency coil provided by Embodiment 2 of the present invention. In the technical solution of this embodiment, on the basis of the above embodiments, the radio frequency signal is specifically defined as imaging data; the coupling related parameter is specifically defined as the center distance between two coil units. Correspondingly, the method specifically includes the following operations:

[0065] S210. Scan the image according to the scout image to acquire imaging data.

[0066] In order to remove the coupling between the coil units, the embodiment of the present invention adopts scout scanning, which is performed to obtain the exact position of the lesion before scanning the lesion of the patient. Scout scans typically acquire sagittal, coronal, or cross-sectional images of the patient. The scout scan only needs to quickly scan to obtain the low-resolution image of the patient, and...

Embodiment 3

[0077] Figure 4 It is a flowchart of a method for adjusting a magnetic resonance radio frequency coil provided by Embodiment 3 of the present invention. In the technical solution of this embodiment, on the basis of any of the above embodiments, the radio frequency signal is specifically limited to noise data; the coupling correlation parameter is specifically limited to values ​​of off-diagonal items in the noise correlation matrix. Correspondingly, the method specifically includes the following operations:

[0078] S310. Acquire noise data of the coil unit according to the noise pre-scan.

[0079] S320. Calculate a noise correlation matrix between coil units according to the noise matrix.

[0080] The noise pre-scan is a scan performed without a patient. The scan process is simple, and the noise data of each coil and each unit can be obtained. After obtaining the noise data of the coil units, the noise correlation matrix between the coil units can be calculated according ...

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Abstract

The embodiment of the invention discloses a magnetic-resonance radio frequency coil adjustment method, a magnetic resonance scanning system, and a medium. The method comprises the steps: a, obtaining a radio frequency signal received by a magnetic-resonance radio frequency coil, wherein the radio frequency coil comprises a plurality of radio frequency coil units; b, calculating the coupling relevant parameters of the radio frequency coil units according to the radio frequency signal; c, adjusting the corresponding coil unit meeting a preset condition to be detuned according to the coupling relevant parameters. According to the embodiment of the invention, the method improves the decoupling efficiency, and the decoupling at any position guarantees the accuracy of scanning data obtained by the coil units, thereby improving the quality of an image obtained through the scanning data of the coil units, and improving the signal to noise ratio of the image.

Description

technical field [0001] Embodiments of the present invention relate to magnetic resonance technology, and in particular to a method for adjusting a magnetic resonance radio frequency coil, a magnetic resonance scanning system and a medium. Background technique [0002] At present, the receiving coil of the mainstream magnetic resonance system adopts the design of the array coil, and a plurality of ring coils are arranged in a specific array to form the whole coil. An array coil has a higher signal-to-noise ratio than a single coil for the same coverage area. Between different coil units arranged in an array, due to the existence of magnetic field coupling, there will be mutual interference. When the inter-unit coupling deteriorates to a certain extent, there is an observable loss in the signal-to-noise ratio of the merged image. Therefore, an important design factor of the array coil is decoupling between elements. [0003] The commonly used decoupling method is overlap de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/36G01R33/54
CPCG01R33/365G01R33/543
Inventor 车韶黄文慧
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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