Simulation of EUV Imaging and 3-D Cone-Beam CT Reconstruction on the Plasmasphere  

作　　者：陈志强 郑杰 李亮 徐荣栏 金鑫 黄娅 

机构地区：[1]Key Laboratory of Particle & Radiation Imaging of Ministry of Education,Department of Engineering Physics,Tsinghua University [2]Centre of Space and Applied Research,Chinese Academy of Sciences

出　　处：《Tsinghua Science and Technology》2010年第1期127-132,共6页清华大学学报（自然科学版（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Nos.10575059,60871084,and 10905030)

摘　　要：A three-dimensional （3-D） phantom for the density distribution of the plasmasphere is established. The imaging processes of the extreme ultraviolet （EUV） Imager are computer-simulated, in which the Earth shelter is treated as a main problem. A modified ART method is devised to resolve the incomplete data reconstruction problem to validate and evaluate the proposed methods. The cone-beam EUV data are simu- lated based on the 3-D phantom from both a circular and semi-circular trajectories. Quantitative reconstruc- tion results demonstrate the correctness of the proposed modified ART algorithm. The CT technique can be used to calculate the global density of the plasmasphere from the EUV data.A three-dimensional （3-D） phantom for the density distribution of the plasmasphere is established. The imaging processes of the extreme ultraviolet （EUV） Imager are computer-simulated, in which the Earth shelter is treated as a main problem. A modified ART method is devised to resolve the incomplete data reconstruction problem to validate and evaluate the proposed methods. The cone-beam EUV data are simu- lated based on the 3-D phantom from both a circular and semi-circular trajectories. Quantitative reconstruc- tion results demonstrate the correctness of the proposed modified ART algorithm. The CT technique can be used to calculate the global density of the plasmasphere from the EUV data.

关 键 词：computed tomography （CT） PLASMASPHERE extreme ultraviolet （EUV） ART algorithm 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]