1. Department
of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, 210002 Jiangsu, P.R. China
2. Laboratory
of Molecular Imaging and Nanomedicine (LOMIN), National Institute
of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health, Bethesda, Maryland 20892, United States
3. Guangdong
Key Laboratory for Biomedical Measurements and Ultrasound Imaging,
Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen, 518060 Guangdong, P.R. China
4. State
Key Laboratory of Analytical Chemistry for Life Science, School of
Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093 Jiangsu P.R. China