1. College of Biomedical Engineering, Sichuan University, Chengdu 610065, China
2. Department of Ultrasound, West China Hospital, Sichuan University, Chengdu 610065, China
3. Highong Intellimage Medical Technology (Tianjin) Co., Ltd., Tianjin 300480, China
4. China-Japan Friendship Hospital, Beijing 100029, China