Radio frequency excitation method and radio frequency excitation device

A radio frequency excitation and radio frequency technology, which is applied in magnetic resonance measurement, measurement using nuclear magnetic resonance imaging system, and magnetic variable measurement, etc., can solve the problems of uneven radio frequency field and poor imaging effect, and achieve the effect of improving quality

Inactive Publication Date: 2019-09-20
SHANGHAI NEUSOFT MEDICAL TECH LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the embodiment of the present application provides a radio frequency excitation method and device, which can solve the problem of poor imaging effect caused by the inhomogeneity of the radio frequency field in the prior art

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  • Radio frequency excitation method and radio frequency excitation device

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Embodiment Construction

[0056] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0057]It should be understood that in this application, "at least one (item)" means one or more, and "multiple" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that there can be three types of relationships, for example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same ...

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Abstract

The embodiment of the invention discloses a radio frequency excitation method and a radio frequency excitation device. The method comprises the steps of: obtaining the radio frequency field distribution data of a magnetic resonance device in advance, wherein the radio frequency field distribution data comprise a radio frequency field intensity corresponding to a plurality of sampling positions in the magnetic resonance device; acquiring a current imaging slice layer of the radio frequency excitation at each time of the radio frequency excitation; correcting the radio frequency waveform output by the radio frequency excitation based on the position of the current imaging slice layer and the radio frequency field distribution data; and outputting the corrected radio frequency waveform to achieve the radio frequency excitation, so that the radio frequency field intensity of the current imaging slice layer is consistent with an expected radio frequency field strength during image reconstruction, and the image reconstruction quality and the MRI imaging effect are improved.

Description

technical field [0001] The present application relates to the technical field of medical equipment, in particular to a radio frequency excitation method and device. Background technique [0002] Magnetic resonance imaging (Magnetic Resonance Imaging, MRI), as a multi-parameter, multi-contrast imaging technology, is one of the main imaging methods in modern medical imaging. MRI can reflect various characteristics such as T1, T2 and proton density of tissues, and can provide effective information for the detection and diagnosis of diseases. [0003] The basic working principle of MRI is to use the magnetic resonance phenomenon, adopt radio frequency excitation, excite the hydrogen protons in the human body, change the rotation and arrangement direction of the hydrogen atoms to make them resonate, then analyze the electromagnetic waves released by the hydrogen atom resonance, and use the gradient field to encode the position. Then the receiving coil is used to receive the elec...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01R33/32G01R33/48
CPCG01R33/32G01R33/48
Inventor武志刚徐志坚徐勤
OwnerSHANGHAI NEUSOFT MEDICAL TECH LTD