Method and device for functional magnetic resonance imaging

A technology of functional magnetic resonance and imaging method, which is applied in the field of magnetic resonance and can solve the problems of the degradation of magnetic resonance image quality, the generation of image artifacts and reconstruction noise, and the inaccurate fitting of uncollected data.

Active Publication Date: 2015-02-11
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

Since the partially separable function algorithm obtains the magnetic resonance image by fitting and estimating the conventional least squares method, it often results in inaccurate fitting of missing and unacquired data, and reconstruction of noise, thus Generates image artifacts and reconstruction noise that degrades MR images

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  • Method and device for functional magnetic resonance imaging
  • Method and device for functional magnetic resonance imaging
  • Method and device for functional magnetic resonance imaging

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[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 embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] In one embodiment, such as figure 1 As shown, a functional magnetic resonance imaging method is provided, and the method specifically includes:

[0022] Step 102, acquiring navigation data and measurement data collected in (k-t) space by using the sampling mode of the partially separable function algorithm.

[0023] Since it is difficult to obtain MR (magnetic resonance, magnetic resonance) data through dense sampling, there will be a trade-off between spatial resolution and temporal resolution, that is, if the spatial resolution increases, the temporal resolution will decrease. , converse...

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Abstract

The invention provides a method for functional magnetic resonance imaging. The method comprises the following steps: obtaining navigation data and measurement data which are collected in a (k-t) space by utilizing a sampling mode of partial separable functions algorithm; obtaining a time primary function according to the navigation data; introducing a two norm constraint structure to rebuild a model according to the time primary function and the measurement data, and obtaining an optimal space primary function by utilizing the rebuilt model; obtaining a rebuilt functional magnetic resonance image according to the optimal space primary function and L-order partial separable functions algorithm model. Through the use of the method, an image artifact and rebuilding noise can be effectively reduced, so that the image quality is improved. In addition, the invention also provides a device for the functional magnetic resonance imaging.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance, in particular to a functional magnetic resonance imaging method and device. Background technique [0002] fMRI (functional magnetic resonance imaging, functional magnetic resonance imaging) is an emerging neuroimaging method that can accurately locate neuronal activity without trauma. Currently the most widely used is the fMRI of the BOLD (Blood Oxygenation Level Dependent) effect. The BOLD brain functional magnetic resonance imaging method mainly uses the EPI sequence (Echo-Planar Imaging, echo-planar imaging) acquisition method for rapid imaging. However, the EPI sequence itself has too high requirements on the gradient of the magnetic field hardware, and the EPI sequence acquisition method will make the spatial resolution of the image lower, and the image is prone to geometric distortion, resulting in the loss of some functional signals or the generation of wrong functional activat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055
CPCA61B5/0042A61B5/055A61B5/4064A61B5/7207
Inventor 史彩云谢国喜张丽娟刘新郑海荣
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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