1. Science and Technology Innovation Center, Guangyuan Central Hospital, Guangyuan 628000, China
2. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
3. Department of Ultrasound Medical Center, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China