Two dimensional visualization method of fMRI data based on popular learning algorithm

A popular learning and data technology, applied in the field of biomedical image pattern recognition, to achieve the effect of high stability, high efficiency and stability

Active Publication Date: 2017-11-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

At present, there is no good method to reduce the dimensionality of fMRI data on the basis of maintaining the spatial topological relationship of brain voxels, and visualize it in a two-dimensional plane

Method used

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  • Two dimensional visualization method of fMRI data based on popular learning algorithm
  • Two dimensional visualization method of fMRI data based on popular learning algorithm
  • Two dimensional visualization method of fMRI data based on popular learning algorithm

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Embodiment Construction

[0035] The specific implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0036] A method for 2D visualization of fMRI data based on popular learning algorithms. The specific implementation steps are as follows:

[0037] Step A: Raw Data Construction

[0038] Read the Broadman template data matrix, and extract the coordinates of voxel points belonging to the 17-19 functional area (that is, find out the spatial positions of all voxel points with values ​​17, 18, and 19 in the read three-dimensional matrix). The spatial coordinates of these voxel points and the numbers of brain regions are formed into an m*4 matrix (m is the number of extracted voxels). Take this matrix as our input original data set X={x 1 , x 2 , x 3 ,...,x n} T , where x i =(ri ,p i ...

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Abstract

The invention discloses a two-dimensional visualization method of fMRI data based on a popular learning algorithm, the method belonging to the technical field of biomedical image pattern recognition, and in particular relates to a dimensionality reduction visualization method of functional magnetic resonance image data. According to the invention, by using a popular learning algorithm, dimensionality reduction is carried out for fMRI data and two-dimensional visualization of brain voxels is realized, with high efficiency and high stability. Moreover, a dimensionality reduction mechanism of the t-SNE algorithm also determines that the result of two-dimensional visualization can maintain an original spatial topological relationship of the data. The invention puts forward the new and effective method for the two-dimensional visualization of the functional magnetic resonance data, which applies the popular learning algorithm to the two-dimensional visualization of the brain fMRI data for the first time and can be used as a supplementary means of the traditional cortex developed view and expansion graph.

Description

technical field [0001] The method belongs to the technical field of biomedical image pattern recognition, and specifically relates to a dimensionality reduction visualization method for functional magnetic resonance image data. Background technique [0002] In recent years, blood oxygenation level-dependent functional magnetic resonance imaging (BOLD-fMRI) technology has developed rapidly. Compared with other existing brain functional imaging techniques, fMRI not only has higher temporal resolution, but also spatial resolution can reach millimeter level. Therefore, we can use fMRI to accurately and reliably localize specific cortical regions of brain activity. In order to visualize the cortical regions of these brain activities, the visualization of fMRI data is particularly important. [0003] The two-dimensional visualization of functional magnetic resonance data refers to the presentation of the processed and analyzed fMRI data in a two-dimensional plane in an intuitive...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
CPCG06T11/005G06T2207/10088G06T2207/20081
Inventor 陈华富颜红梅王冲黄伟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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