1. Department of Ultrasound
2. Ningbo First Hospital
3. Ningbo 315010
4. China
5. Medical School of Ningbo University
6. Cixi Institute of Biomedical Engineering
7. CAS Key Laboratory of Magnetic Materials and Devices
8. Zhejiang Engineering Research Center for Biomedical Materials
9. Ningbo Institute of Materials Technology and Engineering
10. Chinese Academy of Sciences