Robert C. Hendel, M.D., is a Professor of Medicine and Radiology, specializing in the diagnosis and management of complex cardiac diseases with a particular focus on cardiac imaging and the appropriate use of cardiovascular technology. He has authored more than 200 publications and 8 textbooks as well as given invited lectures in more than 15 countries. He is a past president of the American Society of Nuclear Cardiology and of the Cardiovascular Council of the Society of Nuclear Medicine. He has also served in leadership roles in the American College of Cardiology, including two terms as a Trustee of this organization. He also has been a member of editorial boards for multiple journals.   Gary V. Heller, MD, PhD has more than 30 years of experience in clinical cardiology and nuclear cardiology. He established the first PET program in Connecticut that focused on cardiac perfusion, myocardial viability assessment and cardiac sarcoid. He is a former program directorof the Cardiovascular Fellowship Program at Hartford Hospital/University of Connecticut School of Medicine. Dr. Heller is past-president of the American Society of Nuclear Cardiology and has been a member of the Editorial Boards of several journals including American Journal of Cardiology, Journal of the American College of Cardiology, and the Journal of Nuclear Cardiology. He is also past-president of the Intersocietal Accreditation Commission (IAC), as well as past-president of the IAC-Nuclear-PET Division.