Brain functional magnetic resonance imaging method and brain functional magnetic resonance imaging system

Abstract

The invention discloses a brain functional magnetic resonance imaging method. The brain functional magnetic resonance imaging method includes alternately sampling image data and navigation data of k spatial data of a layer of a target brain area; creating a time-based function and an order in an expression of a partially separable function of magnetic resonance signals according to the navigation data; creating a space-based function in the expression according to the image data and the order; acquiring the expression of the partially separable function of the magnetic resonance signals; computing data of the magnetic resonance signals according to the expression of the partially separable function of the magnetic resonance signals; reconstructing brain functional images according to the data of the magnetic resonance signals. The brain functional magnetic resonance imaging method has the advantages that the space-based function is computed according to the image data with high space resolution, the time-based function is computed according to the navigation data with high time resolution, and the brain functional images are further reconstructed according to the space-based function and the time-based function, so that the obtained images are high in space resolution and time resolution. The invention further provides a brain functional magnetic resonance imaging system.

Description

【Technical field】 [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a brain functional magnetic resonance imaging method and system. 【Background technique】 [0002] Functional magnetic resonance imaging (functional magnetic resonance imaging, fMRI) technology has become the fastest-growing brain functional imaging technology because of its advantages of non-invasive positioning of neuron activity, good repeatability and feasibility. One of the new technologies. Functional magnetic resonance imaging is functional magnetic resonance imaging used to image the brain. [0003] According to the traditional Nyquist (Nyquist) sampling theorem, there is a contradiction between the spatial resolution and the temporal resolution of the acquired image. If you want to obtain a high spatial resolution image, you must sacrifice the time of the image. Resolution, if the time resolution of the image is to be increased, the spatial resolutio...

AI Technical Summary

Problems solved by technology

[0004] Ordinary fMRI imaging, on the one hand, is restricted by factors such as magnetic resonance physics and hardware. In order to achieve a certain spatial resolution of the obtained image, it usually takes 2 to 3 seconds to obtain a whole brain image, resulting in the The time resolution is not high; on the other hand, the increase in local force flow caused by brain neuron activity is short-lived, and the functional signal is easily affected by factors such as blood flow and inadvertent head movement during the sampling process, which lead to The collected images may be inaccurate, that is, the spatial resolution of the images is not high

[0005] All in all, the spatial resolution and temporal resolution of images acquired by ordinary fMRI imaging are not high

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