ABSTRACT
Medical imaging technologies have a central role in radiotherapy treatment planning, in guiding treatment, and in assessing treatment response. e localization of targets and normal anatomy for treatment planning relies on a variety of medical imaging modalities, including computed tomography (CT), magnetic resonance (MR), and positron-emission tomography (PET). Image-guided radiotherapy (IGRT) delivery controls treatment accuracy and precision with frequent reference to the treatment plan. Multiple modalities are also used for the assessment of treatment response in patient follow-up exams, with comparison with diagnostic and prior follow-up scans.
