Analysis on Reconstruction Technique Using Dynamic Grids in Tomographic Gamma Scanning Method for Radioactive Waste Drum

Abstract

Abstract: A new image reconstruction algorithm employing dynamic grids technique was proposed for tomographic gamma scanning (TGS). The process of detection was simulated aiming at the single-point and multi-point sources in the matrix with three different densities. The results of the transmission reconstruction and emission reconstruction exhibit that the emission reconstruction error and grids number by using dynamic grids is less than that by using fixed grids in most cases respectively. Moreover, with the increase of the source position radius or the matrix density, the emission reconstruction error of fixed grids will increase, but the error still maintains the low level if dynamic grids are applied. It is indicated that the high detection accuracy is obtained for the full segment of radioactive waste drum filled with high density matrix if dynamic grids are used in TGS emission reconstruction.

Key words: tomographic gamma scanning, dynamic grids, emission reconstruction

CLC Number:

TL 81

GU Wei-Guo, WANG De-Zhong, LIU Cheng, QIAN Nan. Analysis on Reconstruction Technique Using Dynamic Grids in Tomographic Gamma Scanning Method for Radioactive Waste Drum[J]. Journal of Shanghai Jiaotong University, 2013, 47(04): 505-512.

References

［1］杨明太, 张连平. 桶装核废物的非破坏性分析［J］. 核电子学与探测技术, 2003, 23(6)：600603.
YANG Mingtai, ZHANG Lianping. Nondestructive assay of nuclear waste in drum［J］. Nuclear Electronics and Detection Technology, 2003, 23(6)：600603.
［2］Estep R J, Prettyman T H, Sheppard G A. Tomographic gamma scanning to assay hterogeneous radioactive waste［J］. Nuclear Science and Engineering, 1994, 118：145152.
［3］Ramkumar V, Marcel Villani, Stephen C, et al. An integrated tomographic gamma scanning system for nondestructive assay of radioactive waste［J］. Nuclear Instruments and Methods in Physics Research A, 2007,579(1)：375379.
［4］肖雪夫, 夏益华, 吕峰, 等. 用于固体放射性废物无损定量测量的TGS图象重构技术［J］. 辐射防护, 2001, 21(1): 110.
XIAO Xuefu, XIA Yihua, L feng, et al. Tomographic gamma scanning for nondestructive assay of heterogeneous solid radioactive waste in drum［J］. Radiation Protection, 2001, 21(1): 110.
［5］刘诚, 王德忠, 戚屯锋, 等. 核废物桶放射性探测的层析γ扫描技术［J］. 上海交通大学学报, 2010, 44(9): 12871291.
LIU Cheng, WANG Dezhong, QI Tunfeng, et al. Tomographic gamma scanning technique for radioactivity detection of nuclear waste drum［J］. Journal of Shanghai Jiaotong University, 2010, 44(9): 12871291.
［6］成雨, 翁文庆, 白云飞, 等. 层析γ扫描技术效率矩阵计算模型分析与修正［J］. 上海交通大学学报, 2008, 42(9)：14711473.
CHENG Yu, WENG Wenqing, BAI Yunfei, et al. Analysis and correction of scale model of tomographic gamma scanning efficiency matrix［J］. Journal of Shanghai Jiaotong University, 2008, 42(9)：14711473.
［7］翁文庆, 王德忠, 张勇, 等. 层析γ扫描透射图像重建算法研究［J］. 核技术, 2008, 31(5): 396400.
WENG Wenqing, WANG Dezhong, ZHANG Yong, et al. Reconstruction algorithm of transmission image in tomographic gamma scanning［J］. Nuclear Techniques, 2008, 31(5): 396400.

［8］Zhang Q H, Hui W H, Wang D, et al. A novel algorithm for transmission image reconstruction of tomographic gamma scanners［J］. Nuclear Science and Techniques, 2010, 21: 177181.
［9］张全虎, 杨道军, 何彬,等. 层析γ扫描中的探测效率刻度［J］. 原子能科学技术, 2008, 42(11): 10431047.
ZHANG Quanhu, YANG Daojun, HE Bin, et al. Calibration of detection efficiency in homographic gamma scanning［J］. Atomic Energy Science and Technology, 2008, 42(11): 10431047.

［10］Min Chan Kim, Kyung Youn Kim, Kyung Jin Lee, et al. Electrical impedance imaging of phase boundary in twophase systems with adaptive mesh regeneration technique［J］. International Communications in Heat and Mass Transfer, 2005, 32(7): 954963.
［11］Wang Huaxiang, Tang Lei, Cao Zhang. An image reconstruction algorithm based on total variation with adaptive mesh refinement for ECT［J］. Flow Measurement and Instrumentation, 2007, 18(56): 262267.
［12］Zhu Hongqing, Shu Huazhong, Zhou Jian, et al. Conditional entropy maximization for PET image reconstruction using adaptive mesh model［J］. Computerized Medical Imaging and Graphics, 2007, 31(3): 166177.
［13］Brankov J G, Yang Yongyi, Wernick M N. Tomographic image reconstruction based on a contentadaptive mesh model［J］. IEEE Transactions on Medical Imaging, 2004, 23(2): 202212.
［14］Wang Daifa, Song Xiaolei, Bai Jing. Adaptivemeshbased algorithm for fluorescence molecular tomography using an analytical solution［J］. Optics Express, 2007, 15(15): 97229730.

[1]	GUO Zeyu1,CHEN Zuogang1,2. A Dynamic Grids Method for Numerical Simulation of Complicated Flexible Movement Flow Field and Its Application [J]. Journal of Shanghai Jiaotong University, 2018, 52(4): 403-409.
[2]	LIU Cheng1,WANG Dezhong1,QI Tunfeng2,LI Shouping2, WANG Chuan2,ZHANG Wen2 . Tomographic Gamma Scanning Technique for Radioactivity Detection of Nuclear Waste Drum [J]. Journal of Shanghai Jiaotong University, 2010, 44(09): 1287-1291.