Dr. Nelson completed training in Emergency Medicine at the Harvard Affiliated Emergency Medicine Residency program in Boston. He is currently Professor of Emergency Medicine and Chief of the Ultrasound Division in the Department of Emergency Medicine at Mount Sinai Hospital in New York City. He has authored dozens of articles and lectured around the world on emergency medicine, point-of-care ultrasound, and medical education. His other books include The Manual of Emergency and Critical Care Ultrasound, Emergency Medicine Oral Board Review Illustrated, and the Atlas of Handheld Ultrasound.