1. Chongqing Key Laboratory of Ultrasound Molecular Imaging, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China;
2. Department of Radiology, Central Hospital of Enshi Autonomous Prefecture, Hubei, China;
3. Department of Ultrasound, Sichuan Provincial Cancer Hospital, Sichuan, China;
4. Department of Ultrasound, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China