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Excitation overturn angle determination method of multilayer parallel excitation dispersion imaging and apparatus thereof

A technology for flipping angles and determining methods, which is applied to measuring devices, measuring magnetic variables, instruments, etc., and can solve problems affecting image contrast and longitudinal magnetization vectors that cannot be fully restored

Pending Publication Date: 2017-09-29
SIEMENS SHENZHEN MAGNETIC RESONANCE
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Problems solved by technology

[0005] However, if the longitudinal magnetization vectors of certain imaged tissues cannot be fully recovered, the signals of these imaged tissues will be attenuated in subsequent scans, which will affect the final image contrast

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  • Excitation overturn angle determination method of multilayer parallel excitation dispersion imaging and apparatus thereof
  • Excitation overturn angle determination method of multilayer parallel excitation dispersion imaging and apparatus thereof
  • Excitation overturn angle determination method of multilayer parallel excitation dispersion imaging and apparatus thereof

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Embodiment Construction

[0045] In order to make the technical solutions and advantages of the present invention clearer, the present invention 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 illustrate the present invention, and are not intended to limit the protection scope of the present invention.

[0046]For the sake of brevity and intuition in description, the solution of the present invention is described below by describing several representative implementation manners. Numerous details in the embodiments are only used to help the understanding of the solutions of the present invention. But obviously, the technical solutions of the present invention may not be limited to these details when implemented. In order to avoid unnecessarily obscuring the solution of the present invention, some embodiments are not described in detail, but only a framework is g...

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Abstract

An embodiment of the invention discloses an excitation overturn angle determination method of multilayer parallel excitation dispersion imaging and an apparatus thereof. The method comprises the following steps of determining a first area to be imaged and a second area to be imaged, wherein the first area to be imaged and the second area to be imaged possess different longitudinal relaxation time; determining an image contrast function between the first area to be imaged and the second area to be imaged when the multilayer parallel excitation dispersion imaging is executed; and based on the image contrast function, determining an excitation overturn angle of a dispersion weight sequence. In the embodiment of the invention, when the multilayer parallel excitation dispersion imaging is executed, an imaging organization contrast which is the same with or is similar to single-layer excitation dispersion imaging can be acquired.

Description

technical field [0001] The invention relates to the technical field of diffusion imaging, in particular to a method and a device for determining an excitation flip angle for multi-layer parallel excitation diffusion imaging. Background technique [0002] Magnetic Resonance (MR) imaging is a biomagnetic nuclear spin imaging technology developed rapidly with the development of computer technology, electronic circuit technology, and superconductor technology. It uses a magnetic field and radio frequency pulses to vibrate the precessing hydrogen nuclei (ie H+) in human tissue to generate radio frequency signals, which are processed by a computer and imaged. When an object is placed in a magnetic field, it is irradiated with appropriate electromagnetic waves to make it resonate, and then the electromagnetic waves released by it are analyzed, and the position and type of the atomic nuclei that make up the object can be known, and the precise interior of the object can be drawn acc...

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Application Information

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IPC IPC(8): G01R33/58
CPCG01R33/586
Inventor 刘薇周堃肖楠张琼
Owner SIEMENS SHENZHEN MAGNETIC RESONANCE
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