Thomas “Rock” Mackie is a medical physicist. He grew up in Saskatoon and received his undergraduate degree in Physics from the University of Saskatchewan in 1980. He went on to earn his doctorate in Physics at the University of Alberta in 1984. His expertise is in radiation therapy treatment planning and intensity modulated radiation therapy. He is a primary inventor and algorithm designer of the helical tomotherapy concept. Mackie is a professor in the departments of Medical Physics, Human Oncology, Biomedical Engineering and Engineering Physics at the University of Wisconsin–Madison. He has over 150 peer-reviewed publications, over 15 patents, and has been the supervisor for dozens of Ph.D. students. Mackie is a Fellow of the American Association of Physicists in Medicine and a member at