1. Department of Ultrasound Ruijin Hospital Shanghai Jiaotong University School of Medicine Shanghai 200025 P. R. China
2. Department of Ultrasound Zhongshan Hospital Fudan University Shanghai 200032 P. R. China
3. Medmaterial Research Center Jiangsu University Affiliated People's Hospital Zhenjiang 212002 P. R. China
4. State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 P. R. China
5. Shanghai Engineering Research Center of Organ Repair Materdicine Lab School of Life Sciences Shanghai University Shanghai 200444 P. R. China