1. Department of Radiology, Beijing Jishuitan Hospital, Xicheng District, Beijing, China
2. Department of Radiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, China
3. Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
4. School of Biomedical Engineering & Imaging Sciences, King's College London, St Thomas' Hospital, London, United Kingdom