1. School of Biomedical Engineering, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
2. Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
3. College of Computer Science and Technology, Zhejiang University, Hangzhou, China
4. College of Information Science and Engineering, Ritsumeikan University, Kusatsu, Japan
5. Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China