li bi-yong, shi jiang-jun, liu jin, et al. Numerical simulation of distribution of scattered exposure and reduced scatter in flash radiographic system[J]. High Power Laser and Particle Beams, 2005, 17.
Citation:
li bi-yong, shi jiang-jun, liu jin, et al. Numerical simulation of distribution of scattered exposure and reduced scatter in flash radiographic system[J]. High Power Laser and Particle Beams, 2005, 17.
li bi-yong, shi jiang-jun, liu jin, et al. Numerical simulation of distribution of scattered exposure and reduced scatter in flash radiographic system[J]. High Power Laser and Particle Beams, 2005, 17.
Citation:
li bi-yong, shi jiang-jun, liu jin, et al. Numerical simulation of distribution of scattered exposure and reduced scatter in flash radiographic system[J]. High Power Laser and Particle Beams, 2005, 17.
A Monte-Carlo method is used to simulate the transport process of X-ray photons in a model which is made by a 3 m radiographic system for FTO. The scatter distribution of system and the contribution of each cell to the scatter are obtained. It is shown that the back-protected-cone (BPC) is the main source of the scatter in the system. For any pixel, the scattered exposure from the BPC is more than 75% of the total exposure. The outer materials and the edge of FTO produce the main scatter of the object. In order to reduce the scatter of the edge of FTO and BPC, a graded collimator is used in the radiographic system. The graded collimator can reduce the scatter exposure effectively and effectively improve the image quality.
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