20 Years of PET/CT: A Conversation with David Townsend and Thomas Beyer.

![Figure][1] ![Figure][1] Johannes Czernin, MD, editor in chief of The Journal of Nuclear Medicine, talked with David W. Townsend, PhD, and Thomas Beyer, PhD, MBA, about their pioneering work in the development of PET/CT technology. Townsend, whose PhD was in particle physics, was a