1. State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, P.R. China
2. Chongqing Key Laboratory of Biomedical Engineering, Chongqing Medical University, Chongqing, P.R. China
3. National Engineering Research Center of Ultrasound Medicine, Chongqing, P.R. China
4. Department of Radiology, Staten Island University Hospital, Staten Island, NY, USA
5. Department of Cerebrovascular Disease, Suining Central Hospital, Suining, P.R. China
6. Chongqing Haifu Hospital, Chongqing, P.R. China