Image Reconstruction with Perturbed Trajectories in a C-Arm CT System
XU Ming
PU Fang
LI Shu-yu
NIU Hai-jun
FAN Yu-bo
LI De-yu
摘要： For a 3D C-arm computed tomography (CT) system, actual path of the scanner may deviate from the idea circle geometry because of mechanicalinstability, leading to perturbation artifacts in reconstructed images. In this paper, we proposed a modified FBP method for the perturbed trajectories taking into account 6 perturbation parameters without tassuming any condition to be ideal. The preliminary studies demonstrated that this algorithm can acquire promising reconstruction image quality even when the perturbations are relatively large. The comparison of performances among different perturbation parameters is useful for constructing a C-arm CT system.
机标关键词：preliminary studiescomputed tomographyimage quality
分类号：TP391.4(计算技术、计算机技术)
论文发表日期：2015-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：8( 120-127 )
英文信息