摘要
对采用多个能量探测方法来校正层析γ扫描透射图像重建中射线线衰减系数进行了初步探讨。应用蒙特卡洛方法计算了18种材料在不同能量下的γ射线线衰减系数,并拟合得出当物质材料和密度确定时γ射线的线衰减系数与能量的关系,从而重建出不同能量下的透射图像。
Multi-energy method to rectify the linear attenuation coefficients in transmitted image reconstruction by tomographic gamma ray scanning was preliminarily explored. The gamma ray linear attenuation coefficients for different energies were calculated using Monte Carlo method for 18 different kinds of materials. The relationship between ray linear attenuation coefficient and energy was fitted for given material and density, so as to reconstruct transmitted image for different energies.
出处
《辐射防护》
CAS
CSCD
北大核心
2008年第1期24-28,共5页
Radiation Protection
基金
国家自然科学基金资助项目(项目编号:10675084)
关键词
层析γ扫描
多能γ射线
线衰减系数
透射图像重建
Tomographic Gamma Ray Scanning, Multi-Energy Gamma Rays, Linear Attenuation Coefficient, Transmitted Image Reconstruction
