1. Department of Biomedical Engineering, Guangdong Provincial Key Laborary of Medical Image Processing, Southern Medical University, Guangzhou, Guangdong, China
2. Department of Biomedical Engineering, Johns Hopkins University, Baltimore, USA
3. The First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong, China
4. Department of Biomedical Engineering, Guangzhou Key Laboratory of Medical Radiation Imaging and Detection Technology, Southern Medical University, Guangzhou, Guangdong, China