1. Department of Interventional Ultrasound, Chinese PLA General Hospital, Beijing, China;
2. Department of Ultrasound, The First Hospital Shijiazhuang, Shijiazhuang, China;
3. Department of Urological Surgery, Chinese PLA General Hospital, Beijing, China;
4. Department of Cardiovascular Medicine, Chinese PLA General Hospital, Beijing, China;
5. Department of Diagnostic Imaging, American Rhode Island Hospital, Providence, RI, USA