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Magnetic resonance black blood imaging method and system

A black blood imaging and magnetic resonance technology, applied in the field of magnetic resonance black blood imaging methods and systems, can solve the problems of long acquisition time of black blood imaging, and achieve the effect of improving the speed

Pending Publication Date: 2022-01-18
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned black blood imaging methods can only acquire magnetic resonance signals in which the blood flow signal of one layer is completely suppressed. For the case where the scanning part contains multiple layers, the acquisition time of multi-layer black blood imaging will be too long

Method used

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  • Magnetic resonance black blood imaging method and system

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Embodiment 1

[0032] The magnetic resonance black blood imaging method provided in this embodiment is applicable to the situation where black blood imaging is performed simultaneously on multiple slices in magnetic resonance. The method can be executed by a magnetic resonance black blood imaging system, and the system can be realized by software and / or hardware. For example, the processes of sequence design, scanning control and signal processing can be realized by software, but the magnetic resonance scanning of the scanning object is realized by the magnetic resonance scanning device. see figure 1 , the method of this embodiment specifically includes the following steps:

[0033] S110. Using the preparatory pulse module in the preset imaging sequence to simultaneously excite the scanning object, the scanning object includes a first number of slices, and blood flow signals of the first number of slices are suppressed.

[0034] Wherein, the preset imaging sequence refers to a preset pulse...

Embodiment 2

[0049] In this embodiment, on the basis of the first embodiment above, the sequence design of the "preset imaging sequence" is exemplified. On this basis, further optimization is carried out on "performing interlayer de-aliasing and image reconstruction on the interlayer aliased magnetic resonance signals of the fourth number of layers to generate magnetic resonance black blood images of each layer of the scanning object". Wherein, explanations of terms that are the same as or corresponding to the above embodiments are not repeated here. see figure 2 , the magnetic resonance black blood imaging method provided in this embodiment includes:

[0050] S210. Using the preparatory pulse module in the preset imaging sequence to simultaneously excite the scanning object, the scanning object includes a first number of slices, and the blood flow signals of the first number of slices are suppressed.

[0051] S220. When the preset inversion time is reached, use the acquisition imaging ...

Embodiment 3

[0082] This embodiment proposes a magnetic resonance imaging method on the basis of the first and second embodiments above. It includes the following steps:

[0083] Firstly, using the preparatory pulse module in the preset imaging sequence to simultaneously excite the scanning object, and the blood flow signals of multiple levels of scanning are suppressed, wherein the preparatory pulse module includes a first inversion pulse and a second inversion pulse, and The first inversion pulse is a non-layer-selective inversion pulse, and the second inversion pulse is a multi-band layer-selective inversion pulse.

[0084]Secondly, the magnetic resonance signals of at least two levels are simultaneously acquired within one repetition time of the preset imaging sequence, and the magnetic resonance signals of the at least two levels have interlayer aliasing. Optionally, two or more acquisitions may be performed within one repetition time, and magnetic resonance signals of two levels are...

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Abstract

The embodiment of the invention discloses a magnetic resonance black blood imaging method and system. The method comprises the steps that a preparation pulse module in a preset imaging sequence is utilized to excite a scanning object at the same time, and the scanning object comprises a first number of layers where blood flow signals are restrained; when the preset inversion time is reached, a second number of layers in the layers of which the blood flow signals are restrained are simultaneously excited by utilizing an acquisition imaging module in the preset imaging sequence, and interlayer aliasing magnetic resonance signals of the second number of layers are acquired; in a repetition time of the preset imaging sequence, black blood excitation and signal acquisition are repeatedly executed according to a third number, and interlayer aliasing magnetic resonance signals of a fourth number of layers are generated; and interlayer de-aliasing and image reconstruction are conducted on the interlayer aliasing magnetic resonance signals of the fourth number of layers to generate a magnetic resonance black blood image of each layer. By means of the technical scheme, collection of magnetic resonance signals in which multiple layers of blood flow signals are completely inhibited at the same time is achieved, and the magnetic resonance black blood imaging speed is increased.

Description

technical field [0001] Embodiments of the present invention relate to magnetic resonance technology, and in particular to a magnetic resonance black blood imaging method and system. Background technique [0002] Magnetic resonance black blood imaging technology refers to the technique of suppressing the blood flow signal during the magnetic resonance imaging process, so that the blood in the obtained image shows black low signal, while the surrounding tissue shows bright color high signal. [0003] At present, the commonly used magnetic resonance black blood imaging techniques mainly include: spatial presaturation, double inversion recovery (DIR), triple inversion recovery (TIR), quadruple inversion recovery (QIR), DENTY preparation pulse and other methods. The DIR pulse module usually consists of a non-selective pulse (reversing the magnetization of the entire volume) and a selective pulse (reversing the magnetization of the imaging slice), and the TIR pulse module adds a t...

Claims

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Application Information

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IPC IPC(8): G01R33/54A61B5/055
CPCG01R33/54A61B5/055Y02A90/30
Inventor 杨沙沙王超洪李国斌
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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