1. Department of Biomedical Engineering, College of Future Technology, National Biomedical Imaging Center, Peking University, Beijing 100871, China
2. Department of Ultrasound, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
3. Department of Ultrasound, Shenzhen Key Laboratory for Drug Addiction and Medication Safety, Peking University Shenzhen Hospital, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, Guangdong 518036, China