• Cancer investigation · Mar 2014

    Clinically relevant quality assurance for intensity modulated radiotherapy plans: gamma maps and DVH-based evaluation.

    • R Caivano, G Califano, A Fiorentino, M Cozzolino, C Oliviero, P Pedicini, S Clemente, C Chiumento, and V Fusco.
    • Radiation Oncology Department I.R.C.C.S., C.R.O.B. , Rionero in Vulture (Pz) , Italy.
    • Cancer Invest. 2014 Mar 1; 32 (3): 85-91.

    PurposeTo explore a novel patient-dose DVH-based method for pretreatment dose quality assurance tests.Methods20 IMRT plans for head-and-neck cancer patients were used. A comparison was performed between the planned dose distributions, the computed, and the reconstructed ones using the gamma-index (GI) method. The GI analysis was performed using both the 3%/3 mm and the 2%/2 mm criteria.ResultsNo significant DVH-deviation was observed. Considering the 3%/3 mm criteria the mean GI% < 1 for the body and structures was significantly higher compared to 2%/2 mm criteria.ConclusionsOur results underline the importance of QA-methods based on DVH-metrics to predict the impact of delivered dose.

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