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Magnetic resonance imaging method and magnetic resonance system

A technology of magnetic resonance imaging and magnetic resonance data, applied in the field of medical image processing, can solve the problem of long image reconstruction time, and achieve the effect of short scanning time and image reconstruction time, which is beneficial to clinical promotion and reduces reconstruction time.

Active Publication Date: 2021-04-06
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a magnetic resonance imaging method and a magnetic resonance system to solve the technical problem of relatively long image reconstruction time in the prior art compressed sensing magnetic resonance

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  • Magnetic resonance imaging method and magnetic resonance system
  • Magnetic resonance imaging method and magnetic resonance system
  • Magnetic resonance imaging method and magnetic resonance system

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Experimental program
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Embodiment 1

[0048] figure 1 It is a flow chart of the magnetic resonance imaging method provided by Embodiment 1 of the present invention. The technical solution of this embodiment is applicable to the case of acquiring a magnetic resonance image based on a compressed sensing (compressed sensing, CS) magnetic resonance method. The method can be executed by the processor of the magnetic resonance system provided in the embodiment of the present invention, and the apparatus can be realized by software and / or hardware. The method specifically includes the following steps:

[0049]S101. Acquire coil sensitivity of a target coil unit participating in magnetic resonance data acquisition.

[0050] In order to speed up the scanning speed of magnetic resonance, the spatial sensitivity of the receiving coil of the phased array coil or the multi-channel coil is usually used to accelerate the image acquisition, and the image of each receiving coil can be calculated by the coil sensitivity (coil sen...

Embodiment 2

[0069] image 3 It is a structural block diagram of the magnetic resonance system provided by Embodiment 2 of the present invention. The system is used to perform the magnetic resonance imaging method provided by any of the above embodiments, and the system includes:

[0070] MR ((Magnetic Resonance, MR for short)) scanner 110, used to collect magnetic resonance data of the region of interest through the target coil unit;

[0071] The processor 120 is configured to acquire the coil sensitivity of the target coil unit participating in the magnetic resonance data acquisition; based on a preset random undersampling method, acquire the magnetic resonance data of the region of interest in the form of undersampling through the target coil unit, so as to obtain the undersampled Collect data; divide the target coil unit into multiple channel groups according to the spatial position, and perform channel compression on the under-acquisition data corresponding to each channel group to gen...

Embodiment 3

[0078] Figure 4 It is a schematic diagram of the magnetic resonance imaging system provided by Embodiment 3 of the present invention, and this embodiment is an optimization of the foregoing embodiments. Such as Figure 4 As shown, on the basis of the foregoing embodiments, the medical imaging system 100 further includes: a controller 130 and an output device 140 .

[0079] Controller 130 may simultaneously monitor or control MR scanner 110 , processor 120 and output device 140 . The controller 130 may include a central processing unit (Central Processing Unit, CPU), an application-specific integrated circuit (Application-Specific Integrated Circuit, ASIC), a dedicated instruction processor (Application Specific Instruction Set Processor, ASIP), a graphics processing unit (Graphics Processing Unit , GPU), physical processor (Physics Processing Unit, PPU), digital signal processor (Digital Processing Processor, DSP), field-programmable gate array (Field-Programmable Gate Arra...

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Abstract

The embodiment of the present invention discloses a magnetic resonance imaging method and a magnetic resonance system. The method includes: acquiring the coil sensitivity of a target coil unit participating in magnetic resonance data acquisition; The under-acquisition data of the region of interest; the target coil unit is divided into a plurality of channel groups, and channel compression is performed on the under-acquisition data corresponding to each channel group to generate compressed data, wherein the target coil of each channel group The units are arranged sequentially in spatial position; performing image reconstruction on the compressed data according to the coil sensitivity to generate a magnetic resonance image. The technical problem of long image reconstruction time existing in the compressed sensing magnetic resonance in the prior art is solved, and the technical effect of reducing the image reconstruction time of the compressed sensing magnetic resonance is achieved.

Description

technical field [0001] Embodiments of the present invention relate to medical image processing, and in particular to a magnetic resonance imaging method and a magnetic resonance system. Background technique [0002] Magnetic resonance imaging (Magnetic Resonance Imaging, referred to as MRI) can provide better soft tissue contrast than CT (computed tomography, referred to as CT, computerized tomography). However, the scanning time of the magnetic resonance system is usually relatively long. On the one hand, because the magnetic resonance signal is saturated during the excitation process, it is necessary to wait for a period of time until the signal recovers to a sufficient value before the next acquisition can be performed; on the other hand, in order to acquire enough Two-dimensional or three-dimensional imaging of the data needs to be collected repeatedly with different phase encoding gradients. [0003] At present, the commonly used method to speed up the MRI scanning spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/48G01R33/34
CPCG01R33/34G01R33/48
Inventor 王超洪李国斌谭国陞娄昕马林
Owner SHANGHAI UNITED IMAGING HEALTHCARE