1. School of Automation Engineering; University of Electronic Science and Technology of China; Chengdu China
2. Guangdong Provincial Key Laborary of Medical Image Processing; School of Biomedical Engineering, Southern Medical University; Guangzhou China
3. Laboratory of Biomedical Imaging and Signal Processing; the University of Hong Kong; Hong Kong SAR China
4. Department of Electrical and Electronic Engineering; the University of Hong Kong; Hong Kong SAR China