ESTRO 2025 - Abstract Book

S3602

Physics - Quality assurance and auditing

ESTRO 2025

Results: The setup and measurement could typically be completed within 2 hours, including the change of chamber locations and repetitions of each measurement. All measurement values were compared to the predictions from RayStation TPS. Additionally perturbed scenarios with ± 1mm setup and 2% range uncertainty were considered in this comparison. The tolerance level for dose deviations were taken from IAEA TEC-DOC 1540 [4]. The general agreement between plan and measurement for all locations in the treatment plan (Fig. 1) was well within 3%. Single field doses showed maximum deviations of up to 4.5% at peripheral chamber location, taking the perturbed scenarios into account.