Timothy J. Mosher, MS, MD, is Professor of Radiology and Orthopaedics and Chief of Musculoskeletal Radiology, MRI and Radiology Research at the Milton S. Hershey Medical Center, Penn State College of Medicine in Hershey, Pennsylvania. Dr. Mosher’s research career has emphasized the use of MRI in cartilage imaging and osteoarthritis. He is an internationally recognized expert in high-field MR imaging of articular cartilage and pioneered the use of T2 mapping. His research has been supported by an RSNA Research Scholar Grant, Clinical Science Grants from the Arthritis Foundation, and R-01 Grants from the NIH. He has written or coauthored more than 25 original scientific articles, peer-reviewed electronic journal articles, and book chapters on the results of his extensive research. He has lectured extensively on MRI cartilage imaging nationally and abroad and has served on several national and international advisory committees and editorial boards, including the RSNA Distinguished Roster of Scientific Advisors, NIH Arthritis Imaging Study Sections, and ISMRM and RSNA Scientific Committees. He lives in Elizabethtown, Pennsylvania.