1. Department of Ultrasound; the First Affiliated Hospital of Chongqing Medical University; Chongqing China
2. State Key Laboratory of Ultrasound Engineering in Medicine Co-founded by Chongqing and the Ministry of Science and Technology; Chongqing Key Laboratory of Ultrasound in Medicine and Engineering; College of Biomedical Engineering; Chongqing Medical University; Chongqing China
3. Department of Radiology; the First Affiliated Hospital of Chongqing Medical University; Chongqing China
4. Department of Obstetrics and Gynaecology; Suining Central Hospital; Sichuan China