摘要
获取作用深度信息是设计小动物正电子断层成像仪的关键技术之一.我们利用新设计的含有作用深度信息的探测器,从模拟与实验两个方面观测了作用深度信息对于分辨率一致性的影响.结果表明:在γ射线垂直入射时,深度编码探测器和一般的无深度检出机能的探测器,均获得了高分辨率,而γ射线斜入射时,深度编码探测器与一般的探测器相比能提供更好的空间分辨率.
It is well known that if the depth of interaction(DOI) within the crystal can be measured, the parallax error can be corrected and the resolution should be uniform throughout the field of view. We have investigated the spatial resolution of off-center sources in a positron emission tomography (PET) ring detector configuration using our proposed DOI detector. It is confirmed that the depth-encoding detector provides better spatial resolution for the oblique incidence of gamma-rays.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第10期5186-5190,共5页
Acta Physica Sinica
基金
国家创新群体科学基金(批准号:60021201)
浙江省科技计划(批准号:2005C21019)资助的课题.~~