Faculty 2026
Professor of Radiology - Lenox Hill Radiology NYC and University of California, San Diego
Jon A. Jacobson, MD, FACR
Jon A. Jacobson, MD FACR is a board-certified musculoskeletal radiologist. His educational background includes radiology residency at Henry Ford Hospital and musculoskeletal fellowship at the University of California at San Diego. Dr. Jacobson is a Clinical Professor of Radiology at the University of Michigan, where his research interests include musculoskeletal ultrasound and MRI. His academic achievements include over 260 peer-reviewed publications and many invited national and international lectures or workshops. Dr. Jacobson has been a visiting professor on over 50 occasions, is past-President of the Society of Skeletal Radiology, and has received numerous teaching and mentoring awards, including the 2023 Distinguished Educator Award (American Roentgen Ray Society). He is also the author of the textbook “Fundamentals of Musculoskeletal Ultrasound,” which has been translated into 5 languages with its fourth edition now in publication. Dr. Jacobson’s curriculum vitae can be found at www.jacobsonmskus.com.
Associate Professor of Radiology - Georgetown University School of Medicine, Washington, DC
Sandra J. Allison, MD, FACR
Sandra J. Allison, MD is a Board Certified Diagnostic Radiologist and the Director of Ultrasound for Washington Radiology, practicing in the Washington DC and Northern Virginia area. Dr. Allison specializes in Ultrasound with areas of expertise in musculoskeletal, gynecologic, and vascular imaging. She currently holds an Associate Professor of Radiology appointment at Georgetown University School of Medicine where she previously served as Radiology Residency Program Director and Chief of Ultrasound. Dr. Allison is a fellow of the American College of Radiology, the American Institute of Ultrasound in Medicine and the Society of Radiologists in Ultrasound. Dr. Allison completed her diagnostic radiology residency and fellowship in Ultrasound, CT and MRI, at Thomas Jefferson University Hospital in Philadelphia, PA.
Dr. Allison lives in Northern VA with her husband, a practicing Plastic Surgeon and Commander in the United States Naval Reserve. They enjoy traveling with their three adult children, a doctorate candidate son and twin daughters in college. When not at work, traveling or teaching, she tends to her golden doodles puppy, her sourdough starter named Gary, and several citrus trees that remain alive in spite of her best efforts.
MSK Radiologist - Royal Liverpool and Broadgreen University Hospitals
Robert Campbell, MB, ChB, FRCR
Dr Campbell is a Musculoskeletal Radiologist with special interest in sports imaging and musculoskeletal image guided intervention.
Dr Campbell has published extensively and has been an editor of various books and author of various book chapters and various MSK Radiology related articles in various international journals.
He has been a faculty on various national and international MSK Radiology courses and conferences.
He is the past president of the British Society of Skeletal Radiology.
Rebound Orthopedics & Neurosurgery - Vancouver
Jerod Cottrill, DO, FAAPMR, RMSK
Jerod A. Cottrill, D.O., is board-certified in physical medicine and rehabilitation with fellowship training in interventional spine and sports medicine. His specialties include nonoperative sports and musculoskeletal medicine, minimally invasive spine procedures, electrodiagnosis, and musculoskeletal ultrasound (diagnostic and for injection guidance). He offers a comprehensive treatment approach, evaluating the musculoskeletal biomechanics and coordinating rehabilitation medicine, combined with minimally invasive spine or ultrasound-guided joint procedures if needed.
Dr. Cottrill emphasizes the importance of an early diagnosis, a comprehensive treatment plan, and patient education in order to restore function as quickly as possible.
In his free time, Dr. Cottrill enjoys bicycling, skiing, and snowboarding. He serves on the medical pool for the US Ski and Snowboard teams, providing local, national, and international medical coverage for the teams while training and in competition.
Dr. Cottrill is available to see physical medicine and rehabilitation and sports medicine patients at Rebound Orthopedics & Neurosurgery in Vancouver at Rebound Vancouver and at Rebound Lake Oswego.
Assistant Professor of Radiology, University of Ottawa
Dyan Flores, MD
Dr. Dyan V. Flores completed her radiology training in Makati Medical Center in the Philippines, followed by fellowships in the USA, Philippines and Vancouver. She is an Assistant Professor at the University of Ottawa and works as a radiologist in the division of Musculoskeletal radiology in the Department of Medical Imaging at The Ottawa Hospital. Her clinical and academic interests include advanced image-guided interventions, sports imaging, joint biomechanics and hand and wrist injuries.
Dr. Flores is a member of the International Skeletal Society (ISS), Society of Skeletal Radiology (SSR), European Society of Musculoskeletal Radiology (ESSR) and Radiologic Society of North America (RSNA).
Physical Medicine and Rehabilitation - Physical Medicine Associates, Fort Worth, TX
Victor Flores, MD
Dr. Victor H Flores is a Physical Medicine and Rehabilitation Specialist in Fort Worth, Texas. He graduated with honors from the Univ Cetec School of Medicine, Santo Domingo, Dom Rep.in 1981. He has more than 37 years of diverse experiences, especially in physical medicine and rehabilitation.
Chief, Physical Medicine and Rehabilitation - Sharp Rees Stealy Medical Group, La Mesa, California
Jon Halperin, MD FABPMR DipSportMed RMSK
Jonathan S Halperin M.D. is the Chief of Physical Medicine and Rehabilitation at Sharp Rees -Stealy Medical Group in San Diego. He is board certified in Physical Medicine and Rehabilitation with a subspecialty certification in Sports Medicine in both the USA (CAQ-ABMS) and Canada ( DipSportMed CASEM). He has a certification in MSK ultrasound (RMSK) from the ARDMS
He specializes in providing care for patients with non-operative sports, musculoskeletal and spine conditions. He obtained his medical degree from Queen’s University in Kingston, Ontario Canada. He completed his residency in PM&R at Loma Linda University Medical Center. His main areas of interest are in sports and musculoskeletal medicine, applications of diagnostic and interventional musculoskeletal ultrasound, preventative and regenerative musculoskeletal care, and medical education.
He is an avid skier, surfer and recreational cyclist. He has worked as a medical volunteer at the Salt Lake City Paralympics in 2002 and the Vancouver Olympic games in 2010. He is an active member of the Canadian National Alpine ski team medical group and has provided care for Canada’s Olympic ski team since 1985.
Levon Nazarian, MD, FAIUM, FACR, FSRU
Levon N. Nazarian, MD is Professor of Radiology, Professor of Radiology and Orthopaedic Surgery, and Chief of Musculoskeletal Imaging at the Hospital of the University of Pennsylvania. He is a fellow of the American College of Radiology, the Society of Radiologists in Ultrasound, and the American Institute of Ultrasound in Medicine. Dr. Nazarian is Editor Emeritus of the Journal of Ultrasound in Medicine and serves on the editorial boards of multiple other medical journals. He received his AB degree magna cum laude from Harvard College in 1982 and MD from the Cornell University Medical College in 1986 where he was a member of the Alpha Omega Alpha Medical Society. He did his internship in Internal Medicine at Northwestern University, residency in radiology at The New York Hospital – Cornell Medical Center and fellowship in cross-sectional imaging at Thomas Jefferson University where he was a faculty member for many years before accepting his current position at Penn Medicine in 2023.
Associate Professor of Radiology - University of Toronto, Toronto, Ontario, Canada
Linda Probyn, MD
Dr. Probyn is an Associate Professor and Musculoskeletal Radiologist at the University of Toronto. She is the past Program Director and now the Vice-Chair of Education for the Department of Medical Imaging and the current Chair of the Specialty Committee for Diagnostic Radiology at the Royal College of Physicians and Surgeons of Canada. She has interests in ultrasound, sports injuries, trauma, osteoporosis and arthritis as well as teaching and education, including the use of ultrasound simulation. She has published several scholarly articles and presents her work and teaches at many National and International conferences.
Bill Medford, RDMS, RMSKS
