Xiaoguang Cheng is Director and Professor at the Department of Radiology, Beijing Jishuitan Hospital, Beijing, China. He is also the Immediate Past President of Asia Musculoskeletal Society. Yongbin Su is Associate Professor at the same department with Xiaoguang Cheng. Mingqian Huang is an Assistant Professor at the Department of Diagnostic, Molecular and Interventional Radiology, Mount Sinai Health System, New York, NY, USA.