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Volumes
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The good news: the concept of volumes hasn’t changed much
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GTV, CTV, PTV
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OAR, PRV, RVR
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RVR: Remaining Volume at Risk
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The imaged volume within the patient, excluding any delineated OAR
and the CTV’s.
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Is of importance in evaluating plans as there can be unsuspected
regions of high absorbed dose within the patient that would otherwise
not be reported.
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Might be useful in estimating the risk of certain late effects.
SBRT 2017 - D. Verellen