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 with...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.展开更多
基金Supported by NSFC(41374130)National Science Fund for Distinguished Young Scholars(41025015)National Science Foundation(41274109,41104118)
文摘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.
