ESTRO 2024 - Abstract Book

S3660

Physics - Dose prediction, optimisation and applications of photon and electron planning

ESTRO 2024

After this study it is concluded that optimization with gEUD targets is a very useful tool in IMRT-VMAT treatment planning, offering greater control both in PTV coverage and in the protection of healthy tissue and organs at risk.

Keywords: gEUD, VMAT, optimisation

References:

Fogliata A, Thompson S, Stravato A, Tomatis S, Scorsetti M, Cozzi L. On the gEUD biological optimization objective for organs at risk in Photon Optimizer of Eclipse treatment planning system. J Appl Clin Med Phys. 2018;19(1):106 114. doi:10.1002/acm2.12224

2393

Poster Discussion

Dynamic collimator rotation influence on non-coplanar VMAT plan quality using an in-house optimizer

Gian Guyer, Jenny Bertholet, Silvan Mueller, Werner Volken, Peter Manser, Michael K Fix

Inselspital, Bern University Hospital, and University of Bern, : Division of Medical Radiation Physics and Department of Radiation Oncology, Bern, Switzerland

Purpose/Objective:

The intensity modulation of volumetric modulated arc radiotherapy (VMAT) plans is difficult to optimize due to the mechanical constraints on the leaf movement of the multileaf collimator (MLC), which makes it a highly non convex problem. Hypothetically, the optimization result can be improved by rotating the collimator dynamically