1. College of Medical Technology and Engineering; Henan University of Science and Technology; Luoyang 471023 P. R. China
2. Key Laboratory of Biorheological Science and Technology; Ministry of Education; College of Bioengineering; Chongqing University; Chongqing 400044 P. R. China
3. Chongqing Key Laboratory of Ultrasound Molecular Imaging; Medical University of Chongqing Institute of Ultrasound Imaging; Second Affiliated Hospital; Chongqing Medical University; Chongqing 400010 P. R. China