TSENG, ISAAC WEN YIH,曾文毅,曾文毅,HSU, YUNG CHIN,徐泳钦,徐泳欽
申请号：
TW101129000
公开号：
TWI478103B
申请日:
2012.08.10
申请国别(地区):
TW
年份:
2015
代理人:
摘要：
A transformation method for diffusion spectrum imaging (DSI) using the large deformation diffeomorphic metric mapping (LDDMM) algoritm, which includes the following steps: computing the energy value E of a pixel (x, q), where x represents the 3D coordinate in the image space, and q represents the 3D coordinate in the q-space for each time point, solving the first derivative and the second derivative of E with respect to the velocities in the image space and in the q-space, respectively for each time point, iteratively computing the velocity value of the pixel via the Levenberg-Marquardt method integrating the velocities over time to obtain the deformation quantity for each pixel, executing the above steps to construct the deformation map producing the transformed DSI according to the deformation map. Thus, the image itself and the diffusion information thereof can be transformed completely.一種使用高度形變微分同胚度量映射法的擴散頻譜造影轉換方法,包括:依據一能量方程式計算一原始擴散頻譜造影中一個點(x,q)的能量E,x代表影像空間的三維座標,q代表Q空間的三維座標;對每一時間點,求出E對影像空間速度的一階及二階導數,以及E對Q空間速度的一階及二階導數;對每一時間點,使用Levenberg-Marquardt法迭代計算影像空間的速度以及Q空間的速度;將速度對時間積分計算出該點映射到模板影像的變形量;針對該原始擴散頻譜造影的每個點(x,q)的變形量推算出轉換後影像。藉此,影像本身以及內含的擴散資訊都能夠完整轉換。S11~S16‧‧‧步驟
