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A magnetic resonance projection imaging method and device

An imaging method and magnetic resonance technology, which are used in magnetic resonance measurement, measurement using a nuclear magnetic resonance imaging system, measurement devices, etc., can solve the problems of low temporal resolution of projection imaging, improve temporal resolution, and suppress image artifacts. , the effect of acceleration

Active Publication Date: 2019-12-13
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a magnetic resonance projection imaging method and device, which solves the problem of low temporal resolution of projection imaging in the prior art

Method used

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  • A magnetic resonance projection imaging method and device
  • A magnetic resonance projection imaging method and device
  • A magnetic resonance projection imaging method and device

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Embodiment 1

[0034] figure 1 It is a schematic diagram of a magnetic resonance projection imaging method according to an embodiment of the present invention, such as figure 1 As shown, an embodiment of the present invention provides a magnetic resonance projection imaging method, including:

[0035] Step S10, using the non-layer-selective pulse to excite the magnetization vector to the horizontal plane of the magnetic field space, and the horizontal plane is the XY plane;

[0036] Step S20, use the system to allow the maximum gradient ramp rate to open the phase encoding gradient, and at the same time use the system to allow the maximum gradient ramp rate to open the readout pre-dispersion phase gradient; when the phase encoding reaches the preset position corresponding to the k-space and read the pre-dispersion When the phase also reaches the preset position corresponding to the k-space, close the phase encoding gradient and the readout pre-dispersion gradient; after the phase encoding a...

Embodiment 2

[0060] Figure 4 It is a schematic diagram of a magnetic resonance projection imaging device according to an embodiment of the present invention, such as Figure 4 As mentioned above, the embodiment of the present invention provides a magnetic resonance projection imaging device, which is characterized in that it includes an excitation module 10, a control module 20 and a signal acquisition module 30, wherein,

[0061] The excitation module 10 is used to excite the magnetization vector to the horizontal plane of the magnetic field space with the non-layer-selective pulse, and the horizontal plane is the XY plane;

[0062] The control module 20 is used to use the system to allow the maximum gradient ramp rate to open the phase encoding gradient, and at the same time use the system to allow the maximum gradient ramp rate to open the readout pre-dispersion phase gradient; when the phase encoding reaches the preset position corresponding to the k-space and read out When the pre-d...

Embodiment 3

[0069] Figure 5 A schematic structural diagram of an electronic device for magnetic resonance projection imaging provided in an embodiment of the present invention, such as Figure 5 As shown, the device includes: a processor (processor) 801, a memory (memory) 802 and a bus 803;

[0070] Wherein, the processor 801 and the memory 802 complete mutual communication through the bus 803;

[0071] The processor 801 is used to call the program instructions in the memory 802 to execute the methods provided by the above method embodiments, for example, including: using a non-slice pulse to excite the magnetization vector to the horizontal plane of the magnetic field space, and the horizontal plane is XY flat;

[0072] Use the system to allow the maximum gradient ramp rate to open the phase encoding gradient, and at the same time use the system to allow the maximum gradient ramp rate to open the readout pre-dispersion gradient; when the phase encoding reaches the preset position corr...

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Abstract

The invention provides a magnetic resonance projection imaging method and device. The method comprises the following steps: exciting a magnetization vector to a transverse plane of a magnetic field space through a nonselective layer pulse; opening a phase encoding gradient at a system allowable maximum gradient climbing speed, and meanwhile, opening a read-out pre-dispersed phase gradient at the system allowable maximum gradient climbing speed; when phase encoding reaches a preset position corresponding to a k space and the read-out pre-dispersed phase also reaches a preset position corresponding to the k space, closing the phase encoding gradient and the read-out pre-dispersed phase gradient; after the phase encoding and read-out pre-dispersed phase are finished, opening read-out gradientat the system allowable maximum gradient climbing speed; after the read-out gradient climbs to a plateau stage, collecting signals; and opening a phase dispersed gradient in the read-out direction and the layer direction simultaneously. The magnetic resonance projection imaging method and device realize one-time direct projection imaging, accelerate scanning speed, improve time resolution of projection imaging and suppress image artifacts due to motion.

Description

technical field [0001] The present invention relates to the technical field of magnetic resonance imaging, in particular to a magnetic resonance projection imaging method and device. Background technique [0002] Non-invasive small animal imaging is an indispensable tool for researching new drugs and contrast agents, and developing new diagnostic methods and therapeutic methods. Longitudinal studies of various transgenic or pathological model animals require long-term follow-up observations of the same animal. Imaging methods including X-ray computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), etc. Under repeated imaging, monitor the pathological process, evaluate the treatment effect, and evaluate the toxic and side effects. However, both CT and PET are radioactive. If they are exposed repeatedly for a long time, it is easy to cause additional lesions in model animals, especially individuals with genetic defects, which will bring...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/48G01R33/561G01R33/565
Inventor 刘文韬曹玉鹏韩东
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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