1. The Radiology Department of First Hospital of Shanxi Medical University, Taiyuan 030001, China
2. Shanxi Academy of Medical Sciences, Shanxi Medical University, Taiyuan 030001, China
3. The Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Taiyuan 030032, China
4. School of Information and Communication Engineering, North University of China, Taiyuan 030051, China