1. Department of Radiology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China
2. Department of Radiology, Tianjin Medical University General Hospital, Tianjin 300052, China
3. Department of Radiology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Centre of Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China