Institution: | [1]Department of Engineering Physics, Tsinghua University, Beijing 100084, China; [2]Key Laboratory of Particle &: Radiation Imaging (Tsinghua University), Ministry of Education Beijing 100084, China; [3]Medical Imaging Center, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China; [4]Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |