Artifact Mitigation in High Energy CT via Monte Carlo Simulation

摘要：

　　The high energy(< 15 MeV)incident polychromatic γ-ray spectrum and energy-resolved photon attenuations in steel,obtained via EGS/BEAM Monte Carlo,were applied to derive beam hardening correction in steel cylinders and pipes.Monte Carlo simulated pencil beam projections were processed using latch bit filters to isolate exiting primary photons.The beam hardening correction was applied to these projections,which were then interpolated to a uniform grid.Filtered back projections of the raysums with and without the beam hardening correction were compared.It was demonstrated that beam hardening artifacts can be successfully removed for steel structures.

作者: Xuemin Jin Robert Y.Levine

作者单位: Spectral Sciences,Inc.,USA

会议类型: 国际会议

会议名称: Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)

会议地点: 苏州

会议语种:英文

页码: 647-651

在线出版日期: 2011-09-01（万方平台首次上网日期，不代表论文的发表时间）