Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2010, Vol. 21 ›› Issue (3): 177-181 doi: 10.13538/j.1001-8042/nst.21.177-181

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A novel algorithm for transmission image reconstruction of tomographic gamma scaners

ZHANG Quanhu1,* HUI Weihua1 WANG Dong1 HE Bin1 GU Zhongmao2 LI Ze 2 QIAN Shaojun2   

  1. 1 Xi’an Research Institute of High-Tech, Xi’an 710025, China 2 China Institute of Atomic Energy, Beijing 102413, China
ZHANG Quanhu, HUI Weihua, WANG Dong, HE Bin. A novel algorithm for transmission image reconstruction of tomographic gamma scaners.Nuclear Science and Techniques, 2010, 21(3): 177-181     doi: 10.13538/j.1001-8042/nst.21.177-181

Abstract:

It is difficult to develop image reconstruction algorithms for tomographic gamma scanning based on drummed radioactive residues or wastes. In this paper, a novel reconstruction algorithm of transmission image for tomographic gamma scanning is proposed. It is based on the conventional transmission equation and equivalent gamma-ray track length modified by a Monte Carlo method. The algorithm is implemented by simulating the samples on the established platform. For the verification experiments of the algorithm, several cubic voxel samples were designed and manufactured. Experimental tests were conducted. The tomographic gamma scanning of transmission images is compared with the linear attenuation coefficients by the simulated values and experimental data with the algorithm and the reference values. The results show that the absolute relative errors of the reconstructed images are less than 5%.

Key words: Tomographic gamma scanning (TGS), Linear attenuation coefficient, Image reconstruction algorithm, Monte Carlo method