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TU‐C‐BRD‐01: Image Guided SBRT I: Multi‐Modality 4D Imaging
Author(s) -
Cai J,
Mageras G,
Pan T
Publication year - 2014
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.4889261
Subject(s) - modality (human–computer interaction) , modalities , medical imaging , medical physics , magnetic resonance imaging , computer science , image guided radiation therapy , image registration , medicine , radiology , computer vision , artificial intelligence , image (mathematics) , social science , sociology
Motion management is one of the critical technical challenges for radiation therapy. 4D imaging has been rapidly adopted as essential tool to assess organ motion associated with respiratory breathing. A variety of 4D imaging techniques have been developed and are currently under development based on different imaging modalities such as CT, MRI, PET, and CBCT. Each modality provides specific and complementary information about organ and tumor respiratory motion. Effective use of each different technique or combined use of different techniques can introduce a comprehensive management of tumor motion. Specifically, these techniques have afforded tremendous opportunities to better define and delineate tumor volumes, more accurately perform patient positioning, and effectively apply highly conformal therapy techniques such as IMRT and SBRT. Successful implementation requires good understanding of not only each technique, including unique features, limitations, artifacts, imaging acquisition and process, but also how to systematically apply the information obtained from different imaging modalities using proper tools such as deformable image registration. Furthermore, it is important to understand the differences in the effects of breathing variation between different imaging modalities. A comprehensive motion management strategy using multi‐modality 4D imaging has shown promise in improving patient care, but at the same time faces significant challenges. This session will focuses on the current status and advances in imaging respiration‐induced organ motion with different imaging modalities: 4D‐CT, 4D‐MRI, 4D‐PET, and 4D‐CBCT/DTS. Learning Objectives: 1. Understand the need and role of multimodality 4D imaging in radiation therapy. 2. Understand the underlying physics behind each 4D imaging technique. 3. Recognize the advantages and limitations of each 4D imaging technique.