Geometric matrix research for nuclear waste drum tomographic gamma scanning transmission image reconstruction

ZHANG Jin-Zhao; TUO Xian-Guo

doi:10.1088/1674-1137/39/6/068202

Chinese Physics C> 2015, Vol. 39> Issue(6) : 068202 DOI: 10.1088/1674-1137/39/6/068202

Geometric matrix research for nuclear waste drum tomographic gamma scanning transmission image reconstruction

ZHANG Jin-Zhao ^, ,
TUO Xian-Guo

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Abstract：
A geometric matrix model of nuclear waste drums is proposed for transmission image reconstruction from tomographic gamma scans (TGS). The model assumes that rays are conical, with intensity uniformly distributed within the cone. The attenuation coefficients are centered on the voxel (cube) of the geometric center. The proposed model is verified using the EM algorithm and compared to previously reported models. The calculated results show that the model can obtain good reconstruction results even when the sample models are highly heterogeneous.

References

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Prettyman T H, Cole R A, Estep R J et al. Nuclear Instrum. Methods in Physics Research A, 1995, 356(2): 470-475[2] BAI Y F, Mauerhofer E, WANG D Z et al. Applied Radiation and Isotopes, 2009, 67(10): 1897-1903[3] Robert-Coutant C, Moulin V, Sauze R et al. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1999, 422(1-3): 949-956[4] Camp D C, Martz H E, Roberson G P et al. Nuclear Instrum. Methods in Physics Research A, 2002, 495(1): 69-83[5] Krings T, Mauerhofer E. Applied Radiation and Isotopes, 2012, 70(7): 1100-1103[6] Estep R J. A Preliminary Design Study for Improving Performance in Tomographic Assays. Los Alamos National Lab., NM (United States), 1994[7] Prettyman T H, Cole R A, Estep R J et al. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1995, 356(2): 470-475

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ZHANG Jin-Zhao and TUO Xian-Guo. Geometric matrix research for nuclear waste drum tomographic gamma scanning transmission image reconstruction[J]. Chinese Physics C, 2015, 39(6): 068202. doi: 10.1088/1674-1137/39/6/068202

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Received: 2014-09-28
Revised: 1900-01-01

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Geometric matrix research for nuclear waste drum tomographic gamma scanning transmission image reconstruction

ZHANG Jin-Zhao ^,
TUO Xian-Guo

Corresponding author: ZHANG Jin-Zhao,

Received Date: 2014-09-28
Accepted Date: 1900-01-01
Available Online: 2015-06-05

Abstract: A geometric matrix model of nuclear waste drums is proposed for transmission image reconstruction from tomographic gamma scans (TGS). The model assumes that rays are conical, with intensity uniformly distributed within the cone. The attenuation coefficients are centered on the voxel (cube) of the geometric center. The proposed model is verified using the EM algorithm and compared to previously reported models. The calculated results show that the model can obtain good reconstruction results even when the sample models are highly heterogeneous.