1. Sichuan Province Biomechanical Engineering Laboratory 1 , Chengdu, China
2. Department of Mechanical Science and Engineering, Sichuan University 2 , China
3. Department of Medical Imaging and Interventional Radiology, The First Affiliated Hospital of Nanchang University 3 , Nanchang, China
4. Department of Radiology, Key Laboratory of Obstetric and Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University 4 , Chengdu, China
5. Chongqing University Three Gorges Hospital, Chongqing University 5 , Chongqing, China