Tomosynthesis Projection Simulation Based on GPU

Tomosynthesis can reconstruct any sectional image of object using limited angle projection. Before the research of reconstruction method,projection simulation is an important step,this paper proposed a projection simulation method based on GPU Raycasting algorithm. Comparing to CPU simulation method,GPU simulation method is faster in calculation and much closer to the practical projection based on hardware-based trilinear interpolation. This paper simulates projection using traditional CPU method and GPU method respectively,reconstructs the projections above by ART algorithm and Wavelet-Galerkin algorithm and achieves good results.