Validation clinique du champ 1x1 cm² et évaluation de la technique HyperArc pour un usage clinique

Abstract

In this work, we firstly validate the 1x1cm² field for 6MV and 6MVFFF TrueBeam photon beams calculated by Eclipse with measurements performed with suitable detectors in a water phantom. We compared PDDs and profiles using gamma analyses with 3%|1mm or 5%|1mm parameters. We also checked the output factors values to be coherent with the calculated ones. The results confirmed that the 1x1cm² calculated field is suitable for clinical use for intracranial stereotactic treatments. Secondly, we proceed with a plan quality comparison between RapidArc and HyperArc licenses. We used a test patient with 1 cm size lesions to prepare several plans using 1, 2 or 3 targets. As a mean to quantify the plan performance, we used conformity, gradient and homogeneity indexes. We revealed that, for simple stereotactic plans and for the CHU Tivoli work routine, HyperArc does not bring any significant advantages.