Timothy Mosher, Physician Advisor for the Center of Excellence for Improving Diagnosis, is the Kenneth L. Chair, Department of Radiology at Penn State University and Distinguished Professor of Radiology and Orthopaedic Surgery. Dr. Mosher is active in the field of diagnostic error in medicine serving as a member of the Board of Directors for the Society to Improve Diagnosis in Medicine (SIDM) and as a representative of Penn State Health in the Coalition to Improve Diagnosis. Dr. Mosher is a clinical musculoskeletal radiologist with research interest in quantitative MRI for evaluation of articular cartilage and osteoarthritis and application of MRI in multicenter clinical trials. Dr. Mosher is a fellow of the International Society for Magnetic Resonance in Medicine. Previously Dr. Mosher served as Deputy Editor for Magnetic Resonance in Medicine and Associate Editor for Osteoarthritis and Cartilage. He is currently an Associate Editor for MRI for the journal Radiology. He is a member of the SBSR/NIH study section and served on the Scientific Advisory Board for the Canadian Arthritis Network and the Canadian Foundation for Innovation. Dr. Mosher has published over 70 books and manuscripts with the majority in the area of musculoskeletal imaging, quantitative cartilage imaging, and MRI technical development.