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 ›› 2012, Vol. 23 ›› Issue (5): 277-283 doi: 10.13538/j.1001-8042/nst.23.277-283

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Study of image reconstruction using dynamic grids in tomographic gamma scanning

LIU Cheng GU Weiguo* QIAN Nan WANG Dezhong   

  1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
LIU Cheng, GU Weiguo, QIAN Nan, WANG Dezhong. Study of image reconstruction using dynamic grids in tomographic gamma scanning.Nuclear Science and Techniques, 2012, 23(5): 277-283     doi: 10.13538/j.1001-8042/nst.23.277-283

Abstract:

In this paper, a new image reconstruction algorithm employing dynamic grids technique is proposed for tomographic gamma scanning. The key feature of the algorithm is the use of adaptive grid refinement in areas that indicate large values. Simulation results show that the application of dynamic grids has a good performance in emission reconstruction with a distinct advantage in the accurate positioning of the 'hot spots' and reducing the number of grids, but doesn't achieve a tangible improvement in transmission reconstruction.

Key words: Tomographic gamma scanning, Emission reconstruction, Transmission reconstruction, Dynamic grids