1. Department of Ultrasound in Medicine Shanghai Jiao Tong University Affiliated Sixth People's Hospital No. 600 Shanghai 200233 P. R. China
2. Jiangsu Key Laboratory for Carbon‐Based Functional Materials and Devices Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 P. R. China
3. Shanghai Center for Brain Science and Brain‐Inspired Technology Shanghai 200031 P. R. China
4. School of Biomedical Engineering Shanghai Jiao Tong University Shanghai 200030 P. R. China