1. Department of Medical UltrasoundShanghai Tenth People’s Hospital, Ultrasound Research and Education Institute, Tongji University Cancer Center, and Shanghai Engineering Research Center of Ultrasound Diagnosis and TreatmentTongji University School of Medicine 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
2. Department of UltrasoundGuangdong Medical University Affiliated Hospital Zhanjiang 524001 P. R. China
3. Department of Interventional UltrasoundChinese PLA General Hospital 28 Fuxing Road Beijing 100853 P. R. China