1. Key Laboratory of Particle and Radiation Imaging, Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing 100084, P.R. China
2. China Pharmaceutical Preparation Section, Huazhong University of Science and Technology Union Jiangbei Hospital/Wuhan Caidian People's Hospital, Wuhan 430100, P.R. China
3. Personnel Section, Wuhan University Zhongnan Hospital, Wuhan 430065, P.R. China