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.
Clinically relevant quality assurance for intensity modulated radiotherapy plans: gamma maps and DVH-based evaluation
Fiorentino A;
2014-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
