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Remaining volume at risk (RVR)
• All normal tissue that could potentially be irradiated
• Tissues not included in the CTV or not delineated as dose
limiting OARs should still be specifically delineated and
named the
remaining volume at risk
(RVR).
• Dose–volume constraints applied to the RVR avoid
unsuspected regions of high dose.
• The absorbed dose to the RVR can be useful in estimating
the risk of late effects, such as carcinogenesis.
RVR = Body – (CTV + OARs)