Abstract
Tumors often change shape and position over the course of Radiation Therapy. The adaptation of the treatment to these changes, or its initial design to be robust in light of these changes, can be referred to as 4D radiation therapy. The 4th dimension is time and includes short term (intrafraction) and longer term (inter-fraction) changes. IMRT is an important modality for designing plans that can be optimized for or can adapt to these changes. The combination of management of the tumor changes and the optimization of the radiotherapy plans to deal with these changes is 4DIMRT and will be the focus of this 2 part talk. Part 1 : Head and Neck and Prostate treatments, focusing on adaptive therapy and image guidance. Part 2: Thoracic treatments focusing on 4DCT, IGRT, IMRT in the lung and motion management strategies Learning Objectives: 1. Understand currently available IGRT and 4DCT technologies 2. Explain how these technologies can be used to improve dose delivery precision and accuracy, in particular with dynamically changing tumor volumes 3. Understand the challenges and strategies in clinical implementation of IMRT in head and neck, prostate, and thorax.
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