1. School of Biomedical Engineering Southern Medical University, Guangdong Guangzhou China
2. Guangdong Provincial Key Laboratory of Medical Image Processing Southern Medical University, Guangdong Guangzhou China
3. Department of Radiation Therapy The Second Affiliated Hospital Guangzhou University of Chinese Medicine, Guangdong Guangzhou China
4. Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology Southern Medical University, Guangdong Guangzhou China