Journal
CA-A CANCER JOURNAL FOR CLINICIANS
Volume 72, Issue 1, Pages 34-56Publisher
WILEY
DOI: 10.3322/caac.21707
Keywords
0; 35 Tesla MR Guidance; 1; 5 Tesla MR Guidance; adaptive image guidance; adaptive radiation therapy; magnetic resonance (MR)-guided radiation; RT adaption; personalized radiation therapy; Unity; ViewRay
Categories
Funding
- National Institute for Health Research Biomedical Research Center at The Royal Marsden National Health Service Foundation Trust
- Institute of Cancer Research, London
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Radiation therapy (RT) plays a critical role in cancer treatment, with Adaptive RT (ART) being a novel method that utilizes computed tomography or magnetic resonance images for treatment adaptation. ART can impact various cancers, offering potential benefits from reducing toxicity to improving overall survival. The emerging MR-guided ART (MRgART) further advances adaptive image guidance, although it can be more costly, time-consuming, and complex compared to traditional ART methods.
Radiation therapy (RT) continues to play an important role in the treatment of cancer. Adaptive RT (ART) is a novel method through which RT treatments are evolving. With the ART approach, computed tomography or magnetic resonance (MR) images are obtained as part of the treatment delivery process. This enables the adaptation of the irradiated volume to account for changes in organ and/or tumor position, movement, size, or shape that may occur over the course of treatment. The advantages and challenges of ART maybe somewhat abstract to oncologists and clinicians outside of the specialty of radiation oncology. ART is positioned to affect many different types of cancer. There is a wide spectrum of hypothesized benefits, from small toxicity improvements to meaningful gains in overall survival. The use and application of this novel technology should be understood by the oncologic community at large, such that it can be appropriately contextualized within the landscape of cancer therapies. Likewise, the need to test these advances is pressing. MR-guided ART (MRgART) is an emerging, extended modality of ART that expands upon and further advances the capabilities of ART. MRgART presents unique opportunities to iteratively improve adaptive image guidance. However, although the MRgART adaptive process advances ART to previously unattained levels, it can be more expensive, time-consuming, and complex. In this review, the authors present an overview for clinicians describing the process of ART and specifically MRgART.
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