| 用多个能量探测方法校正层析γ扫描透射图像重建中射线线衰减系数 |
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| 引用本文： | 翁文庆,王德忠,张勇,刘诚,杨永亮.用多个能量探测方法校正层析γ扫描透射图像重建中射线线衰减系数[J].辐射防护,2008,28(1):24-28. |
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| 作者姓名： | 翁文庆 王德忠 张勇 刘诚 杨永亮 |
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| 作者单位： | 1. 上海交通大学,上海,200240
2. 秦山核电有限公司,浙江海盐,314300 |
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| 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.
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| 关 键 词： | 层析γ扫描 多能γ射线 线衰减系数 透射图像重建 能量 探测方法 校正 层析 扫描透射 图像重建 γ射线 衰减系数 GAMMA RAY SCANNING IMAGE RECONSTRUCTION COEFFICIENT ATTENUATION LINEAR RECTIFY GAMMA RAYS 透射图像 关系 密度 物质材料 拟合 |
| 收稿时间： | 2007-07-17 |
| 修稿时间： | 2007年7月17日 |
THE METHOD OF MULTI-ENERGY GAMMA RAYS TO RECTIFY LINEAR ATTENUATION COEFFICIENT IN IMAGE RECONSTRUCTION OF TOMOGRAPHIC GAMMA RAY SCANNING |
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| Weng Wenqing,Wang Dezhong,Zhang Yong,Liu Cheng,Yang Yongliang.THE METHOD OF MULTI-ENERGY GAMMA RAYS TO RECTIFY LINEAR ATTENUATION COEFFICIENT IN IMAGE RECONSTRUCTION OF TOMOGRAPHIC GAMMA RAY SCANNING[J].Radiation Protection,2008,28(1):24-28. |
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| Authors: | Weng Wenqing Wang Dezhong Zhang Yong Liu Cheng Yang Yongliang |
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| Abstract: | 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. |
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| Keywords: | Tomographic Gamma Ray Scanning Multi-Energy Gamma Rays Linear Attenuation Coefficient Transmitted Image Reconstruction |
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