Summa Cancer Institute 1 article published in JoVE Medicine Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy Charles A. Kunos1, Jeffrey M. Fabien1, John P. Shanahan1, Christine Collen2, Thierry Gevaert2, Kenneth Poels2, Robbe Van den Begin2, Benedikt Engels2, Mark De Ridder2 1Department of Radiation Oncology, Summa Cancer Institute, 2Department of Radiation Oncology, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel Stereotactic ablative body radiation therapy (SBRT) involves the precise delivery of high-dose radiation to cancer tumor targets. A novel SBRT platform offers a first-of-its-kind gimbaled radiation accelerator mounted within a pivoting O-ring gantry capable of dynamic image-guided tumor tracking. Here, we describe dynamic tumor tracking for lung targets.