Longitudinal Changes in U.S. Parameters of Neurovascular Bundles Suggest Mechanism for Radiation-Induced Erectile Dysfunction oleh James R. Janopaul-Naylor, MD, Tian Liu, PhD, Boran Zhou, PhD, Xiaofeng Yang, PhD, Neal S. McCall, MD, Pretesh R. Patel, MD, Akanksha Mehta, MD, MS, Sherif G. Nour, MD, Ashesh B. Jani, MD, MSEE