Approach for Fast Projection Coefficient Computation in Algebraic Reconstruction Technique
代数重建法中的一种快速投影系数计算方法*

A fast approach for projection coefficient computation was presented,which could determine the grid index and calculate the length of the grid intercepted by the ray only requiring a simple incremental algorithm.Experiment result showed the approach was very effective and the reconstruction speed was improved over 6 times compared with the Siddon algorithm.