1. Department of Ultrasound
in Medicine, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai 200072, P. R. China
2. Department of Ultrasound, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, P. R. China
3. State Laboratory of High Performance Ceramics
and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
4. Department of Radiology, Fudan University Shanghai Cancer Center, Shanghai 200032, P. R. China