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Excitation pulse design method and device, computer equipment and storage medium

A technology of excitation pulse and design method, which is applied in the field of magnetic resonance, can solve the problems of inaccurate magnetic resonance imaging and large echo signal attenuation, and achieve the effect of reducing attenuation and improving accuracy

Pending Publication Date: 2022-02-25
UNITED IMAGING RES INST OF INNOVATIVE MEDICAL EQUIP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

When performing T2* weighted magnetic resonance imaging, if the main magnetic field is not uniform enough, the attenuation of the echo signal will be relatively large, and the attenuation of the echo signal will cause the magnetic resonance imaging to be inaccurate

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  • Excitation pulse design method and device, computer equipment and storage medium
  • Excitation pulse design method and device, computer equipment and storage medium
  • Excitation pulse design method and device, computer equipment and storage medium

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Embodiment Construction

[0063] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0064] The design method of the excitation pulse provided by this application can be applied to such as figure 1 shown in the application environment. The application environment is a magnetic resonance system, and the magnetic resonance system includes a bed 110 and an MR scanner 120 . Wherein, the bed body 110 is used to carry the target object 010 . The MR scanner 120 includes a magnet, a radio frequency transmitting coil, a gradient coil and a radio frequency receiving coil. The radio frequency transmitting coil is used to transmit radio frequency pulses to the targe...

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Abstract

The invention relates to an excitation pulse design method and device, computer equipment and a storage medium. The method comprises the following steps: determining an excitation target according to a main magnetic field, target echo time and a target turnover angle which are acquired in advance; constructing a target function of the excitation pulse; and performing iterative solution on the target function of the excitation pulse to obtain a target amplitude and a target phase of the excitation pulse, wherein the excitation pulse of the target amplitude and the target phase is adopted for excitation to obtain a transverse magnetization vector, and the difference between the transverse magnetization vector and the excitation target is smaller than a preset difference value. By adopting the method, the attenuation of the echo signal can be reduced, and the accuracy of magnetic resonance imaging is improved.

Description

technical field [0001] The present application relates to the field of magnetic resonance technology, in particular to an excitation pulse design method, device, computer equipment and storage medium. Background technique [0002] Magnetic resonance imaging (Magnetic Resonance Imaging, MRI) is a commonly used medical imaging technique. When performing T2*-weighted magnetic resonance imaging, if the main magnetic field is not uniform enough, the attenuation of the echo signal will be relatively large, and the attenuation of the echo signal will cause the magnetic resonance imaging to be inaccurate. [0003] Currently, commonly used solutions include: Z-direction shimming and parallel emission. Among them, Z-direction shimming means making the main magnetic field sufficiently uniform in the Z direction; parallel emission means emitting multiple excitation pulses at the same time. [0004] However, Z-direction shimming is not suitable for three-dimensional excitation with thi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/561G01R33/34G06T11/00G06T17/00
CPCG01R33/5619G01R33/34076G01R33/34069G01R33/34061G01R33/34053G06T11/005G06T17/00
Inventor 全希佳
Owner UNITED IMAGING RES INST OF INNOVATIVE MEDICAL EQUIP