Three-dimensional brain magnetic resonance image brain cortex surface maximum principal direction field diffusion method

A magnetic resonance image and cerebral cortex technology, applied in the field of medical image processing, can solve problems such as inferior local optimum, and achieve the effect of precise geometric structure, good geometric structure and discontinuity

Inactive Publication Date: 2010-10-20
JIANGSU SHUANGNENG SOLAR ENERGY +1
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Problems solved by technology

The existing maximum principal direction field diffusion method on the surface of the cerebral cortex has the following main defects: First, the weights of different cortical surface regions are set to be the same, re

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  • Three-dimensional brain magnetic resonance image brain cortex surface maximum principal direction field diffusion method

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Embodiment Construction

[0036] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0037] According to the maximum principal direction field diffusion method on the surface of the cerebral cortex based on the graph cut method proposed by the present invention, we have implemented a prototype system of the method in C++ language. The source of the image data is: three-dimensional brain magnetic resonance images of normal people in reality.

[0038] The specific implementation steps are as follows:

[0039] 1. Preprocessing and Surface Reconstruction of the Cerebral Cortex:

[0040] The deformable model method was used to remove the braincase, and the registration method was used to remove non-cerebral tissues. The Gaussian mixture model and the Markov random field method were used to segment the image to obtain images represented by three tissue types: white matter, gray matter, and cerebrospinal fluid. Topological correction of white matter i...

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Abstract

The invention relates to a three-dimensional brain magnetic resonance image brain cortex surface maximum principal direction field diffusion method, which has the technical scheme that the method comprises the following steps: carrying out pretreatment and brain cortex surface reconstruction on three-dimensional brain magnetic resonance images; calculating the principal curvature, the principal direction and the differential coefficient of the principal curvature of a peak on the brain cortex surface; using an alpha-expanon graph cut method for minimizing an energy function to carry out diffusion on the maximum principal direction field; and projecting the diffused maximum principal direction field into a tangent plane. The invention has the advantages that: 1. the method sets the weights of smooth items and data items in different regions on the brain cortex surface into different values, so the inherent geometrical structure and discontinuity in the maximum principal direction field can be perfectly maintained; and 2. the principal direction field diffusion is regarded as an energy minimization problem which is converted into a diffusion marking problem, and the alpha-expanon graph cut method can be used for effectively working out the strong local optimum solution of the energy function.

Description

technical field [0001] The present invention relates to a method for the maximum main direction field diffusion on the surface of the cerebral cortex of a three-dimensional brain magnetic resonance image. field of medical image processing. Background technique [0002] The surface of the cerebral cortex reconstructed from 3D brain MRI images is a 2D manifold embedded in 3D space, extremely curled and folded. The analysis based on the surface of the cerebral cortex is very suitable for characterizing and analyzing the essential structure of the cerebral cortex, such as curvature, geodesic distance, cortical thickness, etc. Orientation fields on the surface of the cerebral cortex contain important information, for example, the maximum and minimum principal orientation fields indicate the directions in which the principal curvature reaches its maximum and minimum, respectively. However, it is not easy to reliably compute the principal direction field on the surface of the cor...

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Application Information

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IPC IPC(8): G06T7/00G06T17/40A61B5/055
Inventor 郭雷李刚聂晶鑫赵天云韩军伟胡新韬
Owner JIANGSU SHUANGNENG SOLAR ENERGY
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