1. Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
2. Hubei Province Clinical Research Center for Medical Imaging, Wuhan 430022, China
3. Hubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China
4. Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China