1. Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
2. Department of Radiology, Center for Biomedical Imaging, New York University School of Medicine, New York, New York
3. Quantitative Multinuclear Musculoskeletal Imaging Group, Department of Radiology, Center for Biomedical Imaging, New York University School of Medicine, New York, New York
4. Department of Diagnostic Imaging, The Ottawa Hospital-General Campus, University of Ottawa, Ottawa, Ontario, Canada