1 Department of Abdominal Ultrasound, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, China.
2 Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, China.
3 Department of Abdominal Ultrasound, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, China. Electronic address: 28602540@hebmu.edu.cn.