The invention provides a novel geometric shape quantitative
analysis method for brain subregion tissues, which is characterized in that depth
feature extraction of a CNN-Transform mixed architecture and quantitative characterization of multi-scale differential geometric features are fused, and comprises the following steps: firstly, constructing an SFUNet dual-path
encoder, accurately capturing local details of a brain subregion through depth separable
convolution, and extracting the local details of the brain subregion; modeling global
semantic association of a cross-brain subregion in combination with a Transform
branch, dynamically fusing dual-path features, and accurately segmenting an effective brain subregion tissue range; secondly, designing a quantization method from segmentation to spherical
harmonic coefficient (SPHARM) mapping according to the geometric morphology of the curved surface of the brain subregion, namely, extracting
Gaussian curvature and average curvature point by point after point-to-
point registration through standard spherical parameterization and group average curved surface registration, and respectively representing local convex-concave characteristics and bending strength of a specific
brain tissue region; and finally, constructing a multi-scale differential geometric
feature vector in combination with an SPHARM low-frequency coefficient, and inputting the multi-scale differential geometric
feature vector into an AI
algorithm to realize
brain tissue collaborative analysis of an anatomical structure and geometric deformation.