ESTRO 2023 - Abstract Book

S383

Sunday 14 May 2023

ESTRO 2023

(Acuros XB) model showed an average of 13% (14%) and 8% (11%) higher gamma pass-rates for VMAT- and DCAT arcs, respectively.

Conclusion The insufficient modelling of treatment head components coupled with small-field physics phenomena necessitate the use of approximations in the Eclipse TPS which must be quantified and optimized meticulously for an accurate representation of the stereotactic beam. The current standard protocol for TPS commissioning was shown to produce a non-optimal beam model for small treatment volumes compared to the model given by the proposed protocol in this work which results in a significantly better representation of the stereotactic beam.

MO-0477 Potential of Very High Energy Electron (FLASH) beams in pancreatic and head-and-neck treatments