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Magnetic resonance radio frequency excitation energy automatic correction method

An automatic correction and excitation energy technology, applied in the direction of measuring magnetic variables, measuring devices, instruments, etc., can solve the problems of not being able to reliably guarantee the imaging quality and not being able to adapt to each individual

Active Publication Date: 2016-06-29
河北惠仁医疗设备科技有限公司
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Problems solved by technology

[0004] In the clinical application of magnetic resonance, the conventional method of manually correcting radiofrequency energy and fixing the excitation amount of radiofrequency energy has the defect that the fixed radiofrequency energy cannot be adapted to each individual when there is a large difference between different individuals, which makes this method unreliable. Guarantee the quality of every image

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  • Magnetic resonance radio frequency excitation energy automatic correction method
  • Magnetic resonance radio frequency excitation energy automatic correction method
  • Magnetic resonance radio frequency excitation energy automatic correction method

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, the present invention will be further described.

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0021] This specific embodiment adopts following technical scheme: figure 1 It is a diagram of the magnetic resonance system, which is mainly composed of the main magnet, gradient system, radio frequency system, spectrometer and computer, which are the core components of control. The gradient system mainly includes a gradient pulse generator module, a gradient coil and a gradient amplifier module that generate a gradient magnetic field that varies along the X-axis, Y-...

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Abstract

The invention discloses a magnetic resonance radio frequency excitation energy automatic correction method and specifically relates to the technical field of magnetic resonance imaging. Automatic correction is realized by the following steps of: according to radio frequency pulse shapes, establishing various kinds of excitation energy proportions between forming radio frequency pulses and a standard hard pulse, and forming an index list; in a practical imaging process, when scanning is carried out on different parts of different bodies, using the standard hard pulse for excitation, and automatically correcting the radio frequency energy needed when an excitation angle is 90 degrees and radio frequency energy needed when a flip angle is 180 degrees; and combined with the proportion relation list obtained in the radio frequency pulse design process, calculating the accurate radio frequency energy needed by different parts and different bodies in the magnetic resonance imaging scanning process in real time.

Description

Technical field: [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a method for automatically correcting magnetic resonance radio frequency excitation energy. Background technique: [0002] The basic principle of magnetic resonance imaging is: hydrogen nuclei (hydrogen atoms) in human tissue have spin motion to generate magnetic moments. Under the action of a strong and uniform main magnetic field, the spin magnetic moments of the spin hydrogen protons that are not regularly arranged will be arranged along the direction of the main magnetic field to form a macroscopic magnetic moment. Under the excitation of radio frequency pulses, the macroscopic magnetization vector will be flipped to the direction perpendicular to the main magnetic field, and it can be received by the radio frequency receiving system during the process of precession and rotation, thereby generating magnetic resonance signals, and forming images through dat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/58
CPCG01R33/583
Inventor 徐威陈春霞王保光
Owner 河北惠仁医疗设备科技有限公司
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