1. School of Biomedical Engineering, Shenzhen University, Shenzhen, China
2. National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen, China
3. Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Shenzhen, China
4. Department of Electrical and Computer Engineering, St. Cloud State University, St. Cloud, MN, 56301, USA