Patent ID: 9008397
Filing Date: 2015-04-14
Classification: G01T,G06T

Abstract:
1. A method of tomography based on Cerenkov Effect, comprising: acquiring optical plane images and three-dimensional tomography structural images of a three-dimensional object in multiple viewpoints; executing spatial registration between the optical plane images acquired in multiple viewpoints and corresponding three-dimensional tomography structural images based on fixed marking points as to generate a geometrical mapping table of an optical image—a tomography image; converting a gray value of each of the pixels in the optical plane image into an illumination intensity of a surface on the three-dimensional object based on the geometrical mapping table, and obtaining a distribution B of the illumination intensity; segmenting the three-dimensional tomography structural image for multiple organs of the object, and assigning corresponding pixel values to each of the multiple organs to generate volume data; executing discretization on the volume data by a finite element method, and outputting a volume gridding; establishing a linear mapping table between the distribution B and a distribution S of unknown isotopes S of the object based on a SP3 forward model, B=AS, where A is a system parameter matrix of the SP3 forward model, S is a n-dimensional column vector, m and n are positive integers, and m<n; calculating an objective function F(S) based on a L wherein calculating the objective function F(S) comprises: in a K+1 S when S>η(pq) 3/2 , h(S)=0 and S≦nηpq) 3/2 , η is a real constant; and stopping the iteration if the updated S makes the objective function F