1. National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
2. Sichuan Key Laboratory of Medical Imaging, Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637007, China
3. National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China
4. Department of Radiology, West China Hospital, Sichuan University, Chengdu, 610041, China