1. Chongqing University of Posts and Telecommunications, School of Optoelectric Engineering, Chongqing, China
2. Sichuan University West China Hospital, Department of Medical Ultrasound, Chengdu, China
3. University of Electronic Science and Technology of China, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), Chengdu, China
4. University of South Florida, Department of Medical Engineering, Tampa, Florida, United States