1. College of Computer Science, Sichuan University, Chengdu, China
2. National Key Laboratory of Fundamental Science on Synthetic Vision and the College of Computer Science, Sichuan University, Chengdu, China
3. Department of Radiology, West China Hospital of Sichuan University, Chengdu, China
4. College of Electrical Engineering, Sichuan University, Chengdu, China
5. School of Cyber Science and Engineering and the College of Computer Science, Sichuan University, Chengdu, China