1. School of Biomedical Engineering Shanghai Jiao Tong University Shanghai 200240 China
2. Department of Nuclear Medicine Ruijin Hospital Shanghai 200240 China
3. University of Michigan ‐ Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai 200240 China
4. Lawrence Berkeley National Laboratory Berkeley 94720 CA USA
5. School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China