1. Department of Radiology, Fujian Medical University Cancer Hospital, Fujian Cancer Hospital, Fuzhou, 350014, P. R. China
2. Department of Radiology, Fujian Medical University Union Hospital, Fuzhou, 350001, P. R. China
3. Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China