1. Department of Radiology, Xijing Hospital; Fourth Military Medical University; Xi'an P.R. China
2. Key Laboratory of Molecular Imaging of the Chinese Academy of Sciences, Institute of Automation, Chinese Academy of Sciences; Beijing P.R. China
3. Life Sciences Research Center, School of Life Sciences and Technology; Xidian University; Xi'an P.R. China
4. Xi'an Polytechnic University; Xi'an P.R. China
5. Department of Radiology; General Hospital of Lanzhou Military Region; Lanzhou P.R. China
6. State Key Laboratory of Cancer Biology, Department of Pathology; Xijing Hospital; Fourth Military Medical University; Xi'an P.R. China
7. Department of Neurosurgery, Xijing Institute of Clinical Neuroscience, Xijing Hospital; Fourth Military Medical University; Xi'an P.R. China