First experience with patient oriented Rapid Arc treatment plan verification

Abstract

To verify the fluence distribution and number of monitor units for dynamic treatment techniques each patient treatment plan is applied to a measuring device before first treatment. We verify Rapid Arc treatment plans patient oriented using the IMRT-MatriXX (IBA, Schwarzenbruck, Germany). Therefore we generated a verification protocol. 3 patients with cerebral metastasis, 2 patients with head and neck cancer, and 5 patients with prostate cancer receiving Rapid Arc radiotherapy were included in this study. It is poss-ible to verify the 2D fluence distribution and the number of monitor units of Rapid Arc treatment plans using IMRT-MatriXX within a few minutes. Therefore we recommend the use of the IMRT-MatriXX for Rapid Arc treatment plans in the clinical routine. © 2009 Springer-Verlag.