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, V. Fusco

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To explore a novel patient-dose DVH-based method for pretreatment dose quality assurance tests. Methods: 20 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. Results: No 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. Conclusions: Our results underline the importance of QA-methods based on DVH-metrics to predict the impact of delivered dose.

Original languageEnglish
Pages (from-to)85-91
Number of pages7
JournalCancer Investigation
Volume32
Issue number3
DOIs
Publication statusPublished - Mar 2014

Keywords

  • 3D quality assurance
  • COMPASS system
  • Head and neck
  • IMRT

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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