Image reconstruction from Compton scattering data  

作　　者：PANQiang-Yan Y.GONO S.MOTOMURA S.ENOMOTO Y.YANO 

机构地区：[1]ShanghaiInstituteofAppliedPhysics,theChineseAcademyofSciences,Shanghai201800,China [2]Departmentofphysics,kyushuuniversityfukuoka812-8581,japan [3]Cyclotroncenter,RIKEN,suitama351-0198,japan

出　　处：《Nuclear Science and Techniques》2004年第6期365-367,共3页核技术（英文）

摘　　要：A new image reconstruction method was developed for a Compton camera. A simulation to determine a γ-ray source position was performed by using the simulation tool, GEANT4. An image reconstruction was made in two steps. First, a three dimensional image was constructed and projected in one selected plane, then the points from each ellipse was picked up by taking the peak points of a density distribution of crossing points between the ellipse and the first step image. The second step procedure improved the accuracy and the spatial resolution of a position de- termination significantly, comparing with the image obtained by only the first step. The accuracy and the resolution for a point source were obtained to be about 0.02 mm and (1.35±0.15) mm, respectively. The same procedure was applied to an imaging of the distributed γ-ray source.A new image reconstruction method was developed for a Compton camera. A simulation to determine a γ-ray source position was performed by using the simulation tool, GEANT4. An image reconstruction was made in two steps. First, a three dimensional image was constructed and projected in one selected plane, then the points from each ellipse was picked up by taking the peak points of a density distribution of crossing points between the ellipse and the first step image. The second step procedure improved the accuracy and the spatial resolution of a position de- termination significantly, comparing with the image obtained by only the first step. The accuracy and the resolution for a point source were obtained to be about 0.02 mm and (1.35±0.15) mm, respectively. The same procedure was applied to an imaging of the distributed γ-ray source.

关 键 词：康普敦散射 锗位置探测仪 图象重构 重离子束 γ-射线 

分 类 号：TL814[核科学技术—核技术及应用] O571.323[理学—粒子物理与原子核物理]