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Magnetic resonance image acquiring and reconstructing method and apparatus

A technology of magnetic resonance image and image domain, which is applied in the direction of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, magnetic variable measurement, etc. The effect of imaging speed

Active Publication Date: 2014-12-03
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Abstract
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Problems solved by technology

[0005] In order to solve the problem that the above-mentioned multi-layer excitation acquisition method cannot be used in combination with the existing GRAPPA technology, the present invention provides a magnetic resonance image acquisition and reconstruction method and device that enable these two technologies to be used in combination

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  • Magnetic resonance image acquiring and reconstructing method and apparatus
  • Magnetic resonance image acquiring and reconstructing method and apparatus
  • Magnetic resonance image acquiring and reconstructing method and apparatus

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Embodiment Construction

[0031] In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways than described here, so the present invention is not limited by the specific embodiments disclosed below.

[0033] As mentioned in the background art, in order to increase the imaging speed in the two-dimensional magnetic resonance imaging scan, multiple layers are generally excited to be acquired simultaneously, and the acquired signals are modulated and interlayer separation is achieved during the reconstruction process. For example, in the patent "Method for producing multi-slice NMR images" (US Patent US4843322A...

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Abstract

The invention provides a magnetic resonance image acquiring and reconstructing method. In two-dimensional magnetic resonance imaging, K space is acquired and reconstructed by parallel acquisition using an n-slice acceleration method and a GRAPPA method, wherein the n is more than or equal to 2. By changing a K space undersampling and reconstructing method, a multi-slice stimulation acquiring method and a conventional GRAPPA technique can be combined and used simultaneously. Thus, a problem of damage, to the continuity of the phase modulation circulation of the K space, caused by the multi-slice stimulation acquiring method in conventional K space sampling is solved. Therefore, imaging speed is further increased and interlayer separation compensates a problem of decrease in a signal-to-noise ratio caused by parallel acceleration processing. Further, the invention provides a magnetic resonance image acquiring and reconstructing apparatus.

Description

【Technical field】 [0001] The invention relates to the field of magnetic resonance imaging, in particular to a magnetic resonance image acquisition and reconstruction method and device. 【Background technique】 [0002] In two-dimensional magnetic resonance imaging scanning, in order to increase the imaging speed, multiple layers are generally excited to be acquired simultaneously, and the acquisition signals are modulated and layer separation is achieved during the reconstruction process. For example, in the patent "Method for producing multi-slice NMR images" (US Patent US4843322A), it is proposed to use a specially designed multi-layer excitation radio frequency pulse to realize simultaneous excitation of multiple layers, and to apply different phase modulations to different layers along the phase encoding direction at the same time. A method of separating layers after reconstruction, which can speed up imaging or obtain a higher signal-to-noise ratio in the same time. [0...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/48A61B5/055
Inventor 张卫国
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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