1. School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China
2. Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, Guangzhou 510515, China
3. Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, Guangzhou 510515, China
4. Department of Electronic Engineering, Information School, Yunnan University, Kunming 650504, China
5. Pazhou Laboratory, Guangzhou 510330, China