A novel algorithm for transmission image reconstruction of tomographic gamma scaners

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%. (authors)