The Analysis of Squashing Algorithm for Limited Angle Projection Reconstruction by Simulation
Shu Chen · Ceshi jishu xuebao · 2002
The effect of the limited angle and the number of projections in squashing algorithm for limited angle projection reconstruction are studied. Via simulations, the reconstructed images under different limited angle and the different number of projections by the squashing algorithm are analysed and compared. It is shown that the quality of the reconstructed image has large difference between the different limited angle and the different numbers of projection. When the lost angle is equal to 30° or larger than, the quality of the reconstructed image are deteroited badly. It illuminates that the squashing algorithm is valid only in a narrow fields.