TSENG, ISAAC WEN YIH,曾文毅,曾文毅,YEH, FANG CHENG,叶芳诚,葉芳誠
申请号：
TW101111842
公开号：
TWI474804B
申请日:
2012.04.03
申请国别(地区):
TW
年份:
2015
代理人:
摘要：
A voxel-based transformation method for transforming diffusion MRI data comprises (A) receiving original diffusion MRI data in a subject space and coregistration template data in a template space, the former including positions of voxels, sampling directions and amount of spins in the sampling directions at the positions, the latter including positions of voxels and sampling directions, and proceeding the following steps for each of the voxels, (B) obtaining a position of the original diffusion MRI inversely mapped from the position of the coregistration template using a coregistration method, and the Jacobian matrix of the inverse mapping in relation to the two positions, and (C) adjusting the sampling direction of the coregistration template with the Jacobian matrix and using the adjusted sampling direction and the inversely mapped position of the original diffusion MRI to obtain the amount of the spins in the direction at the position.一種針對擴散磁振造影資料以體積像素為基礎的轉換方法包含:(A)讀取位於形變前空間的原始擴散磁振造影的資料及位於模板空間的對位模板的資料,前者包括體積像素的位置、取樣方向,與位於該位置及取樣方向上的自旋數量,後者包括體積像素的位置及取樣方向;對該等體積像素逐一進行以下演算(B)以一對位方法取得對位模板的位置所反映射到的原始擴散磁振造影的位置,及該二位置的反映射的雅可比矩陣(C)以雅可比矩陣調整對位模板的取樣方向,並藉其與反映射到的原始擴散磁振造影的位置,得出一位於對位模板的位置及取樣方向上的自旋數量。S31~S34...步驟
