1. Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
2. Department of Ultrasound, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
3. Department of Diagnostic Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China