1. Department of Radiology; Fujian Medical University Teaching Hospital, Fujian Provincial Cancer Hospital & Institute; Fuzhou Fujian People's Republic of China
2. Department of Radiation Oncology; Fujian Medical University Teaching Hospital, Fujian Provincial Cancer Hospital & Institute; Fuzhou Fujian People's Republic of China
3. Philips Healthcare; Shanghai People's Republic of China
4. Philips Healthcare; Hong Kong