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Systems and methods for correcting radio frequency pulse distortion

A technology of radio frequency pulses and pulses, applied in the fields of application, medical science, diagnosis, etc., can solve the problems of different designs, distortion, image artifacts, etc.

Active Publication Date: 2022-05-27
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the waveform of the amplified RF pulse produced by the RFPA may be different than designed, which is called distortion
When amplified RF pulses with distortion are applied to the RF coil to generate a magnetic field, the magnetic field, together with slice-selective gradients, may excite one or more undesired slices, which may lead to artifacts in images produced based on MRI scans

Method used

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  • Systems and methods for correcting radio frequency pulse distortion
  • Systems and methods for correcting radio frequency pulse distortion
  • Systems and methods for correcting radio frequency pulse distortion

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Embodiment Construction

[0040] In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those skilled in the art, the present application can also be applied to the present application according to these drawings without any creative effort. other similar situations. It should be understood that these exemplary embodiments are given only to enable those skilled in the relevant art to better understand and implement the present invention, but not to limit the scope of the present invention in any way.

[0041] As shown in this application and in the claims, unless the context clearly dictates otherwise, the words "a", "an", "an" and / or "the" are not intended to be specific in the singular and may include the ...

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Abstract

A method of correcting RF pulse distortion is provided. The method can include obtaining a specified time-domain waveform. The method may also include directing a radio frequency power amplifier (RFPA) of a magnetic resonance imaging (MRI) scanner to generate output RF pulses based on the specified time domain waveform. The method may also include measuring the output time-domain waveform of the output RF pulse. The method may also include determining a modified time domain waveform corresponding to the excitation RF pulse based on the specified time domain waveform and the output time domain waveform. The method may also include instructing the MRI scanner to use the waveform generator and the RFPA, and based on the modified time-domain waveform, generate excitation RF pulses to excite one or more slices of the subject in the MRI scan.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to US Application No. 15 / 721,840, filed September 30, 2017, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates generally to magnetic resonance imaging (MRI), and more particularly to a system and method for correcting radio frequency pulses used in MRI scans. Background technique [0004] Magnetic resonance imaging (MRI) is widely used in medical diagnosis. During an MRI scan, there may be one or more excitations in which one or more slices of the subject may be excited. In excitation, excitation radio frequency (RF) pulses may be applied to excite one or more slices of the subject together with the slice selectivity gradient. Typically, the waveform generator of an MRI scanner can generate RF pulses. The RF pulses generated by the waveform generator can be amplified using a radio frequency power amplifier (RFPA)....

Claims

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Application Information

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IPC IPC(8): A61B5/055
CPCA61B5/055A61B5/72G01R33/3607G01R33/4833G01R33/4835G01R33/5659G01R33/5617G01R33/3614G01R33/543
Inventor 郑远马锦波丁彧魏青沈振华
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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