应用MonteCarlo法的X射线成像-应用科学学报.PDF

27 5 Vol. 27 No. 5 20099 JOURNAL OF APPLIED SCIENCES — Electronics and Information Engineering Sep. 2009 : 0255-8297(2009)05-0485-06 Monte CarloX 210096 : X. . Monte Carlo . Monte Carlo. : Monte CarloX : TP391 : A Simulation of X-Ray Imaging Using Monte Carlo Method SHEN Ao-dong, LI Bing, LUO Li-min Laboratory of Image Science and Technology, Southeast University, Nanjing 210096, China Abstract: A novel method for simulating X-ray imaging is presented to describe scattering of photons. The initial projection is generated by a fast ray tracing technique. Properties of the object are recorded and traversed by the rays simultaneously. The scattering points are then picked along the ray direction based on probability of scattering, neglecting the invalid photons. This is followed by Monte Carlo simulation for photon scattering. Experimental results demonstrate that the presented method provides results within several minutes similar to that obtained with the conventional Monte Carlo algorithms. Keywords: ray tracing, Monte Carlo simulation, scattering of photons, X-ray imaging - 19 XX . ComptonRayleigh X-rayCT. . CT X. X - . . Monte Carlo. Monte