Lecture, four hours. Requisites: courses 203, 216. Designed to provide students theoretical and practical understanding of processes and equipment used for image guided radiation therapy. Emphasis on in-room imaging systems, including their operating principles, manufacturing, workflows, and quality assurance. Detailed discussions of hardware, image acquisition, and image processing provide understanding of theoretical and practical benefits and challenges of each technology. Discussion of clinical workflow and quality assurance to provide more practical information to understand clinical value and implementation challenges for each technology. S/U or letter grading.