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bag V40 Gy reductions up to 25%. The largest reductions were seen with the online 3 mm PTV margin strategy where rectal and bladder V40 Gy was reduced by 48% and 53% respectively. Plan selection resulted in 20% and 25% reduction in rectal and bladder V40 Gy. Conclusion: ART solutions for cervix EBRT reduce PTV volumes and OAR doses. Daily online re-planning delivers the largest OAR dose reductions. A clinical study combining MRI-guided RT and daily online replanning will assess clinical benefit in implementing these ART strategies.

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