1. Department of Radiology First Affiliated Hospital of Xi'an Jiaotong University Xi'an P.R. China
2. Department of Nuclear Medicine Second Affiliated Hospital of Xi'an Jiaotong University Xi'an P.R. China
3. Center for Brain Science First Affiliated Hospital of Xi'an Jiaotong University Xi'an P.R. China
4. Center for Biomedical Imaging Research, Department of Biomedical Engineering Tsinghua University Beijing P.R. China
5. Department of Biomedical Engineering, School of Life Science and Technology Xi'an Jiaotong University Xi'an P.R. China
6. Department of Electrical and Electronic Engineering Yonsei University Seoul Korea