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... etary rights. Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) To my wife, Jutta Frankfurter, and my son, Lucas Skye Folio. . Foreword I was certainly pleased when Dr. Les Folio invited me to write the foreword to his new textbook. We have been friends for many years and shared our understanding of biomechanics and imaging of high-energy trauma as well as our diagnostic approaches. We share a similar level of enthusiasm to maximize the diagnostic potential of imaging in severe trauma and to optimize conditions to facilitate faster and more accurate diagnoses, when time is the most critical commodity of care. We discovered many overlaps in our practice methods, but not surprising, many unique aspects to each. Dr. Folio is a diplomat of the American Osteopathic Board of Radiology and American Osteopathic Board of Occupational and Preventive Medicine attaining Fellowship in both areas. He has earned master's degrees in Public Health, Clinical Radiology, and Aviation Sciences. He has served as an Air Force Radiologist and Flight Surgeon and recently completed 20 years in the Air Force; his final assignment was at Walter Reed Army Medical Center and Uniformed Services University (USU). He is an Associate Professor of Radiology and Radiological Sciences and Associate Professor of Military and Emergency Medicine at USU. He has completed tours of duty in Iraq and has contributed his knowledge in forensic radiology at Dover Air Force Base in Dover, Delaware, studying warfare. If these many significant accomplishments were not enough, he has also earned a black belt from World Taekwondo Federation while stationed in Korea and is a certified Master Scuba Diver and a lifetime member of National Ski Patrol. Relating his other major accomplishments would require another chapter in the book. Clearly, Dr. Folio brings his diverse training and an inquisitive, creative mind to improving diagnostic imaging of the severely injured battlefield casualty. He uses his substantial knowledge of imaging, anatomy, and biomechanics to optimize the treatment of these patients and to constantly learn more to better understand highenergy force injury and possible methods to ameliorate their impact. In this process, he finds new questions that require further investigation. No one in America today has been better trained and experienced to write this text.