1 Engineering Research Center of Molecular and Neuro Imaging of the Ministry of Education, School of Life Science and Technology, Xidian University, Xi'an, China.
2 Thayer School of Engineering, Dartmouth College, Hanover, NH, United States.
3 Faculty of Information Technology, Beijing University of Technology, Beijing, China.
4 Department of Interventional Medicine, Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, China.