1 Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. xiaoli_lan@hust.edu.cn.
2 Hubei Key Laboratory of Molecular Imaging, Wuhan, China. xiaoli_lan@hust.edu.cn.
3 Departments of Radiology and Medical Physics, University of Wisconsin - Madison, 1111 Highland Avenue, Madison, WI, USA.
4 Departments of Radiology and Medical Physics, University of Wisconsin - Madison, 1111 Highland Avenue, Madison, WI, USA. wcai@uwhealth.org.