ESTRO 2024 - Abstract Book

S6001

RTT - Treatment planning, OAR and target definitions

ESTRO 2024

anatomical and positioning changes, adequate coverage was still achieved considering the summed dose on weekly rCTs.

Conclusion:

FullVMAT could result in better outcomes for MHD but may lead to higher V5%/V20% of the lungs and MLD. When making the choice between fullVMAT and parVMAT the target’s location relative to the heart should be considered; fullVMAT appears preferable when the target spans only one side of the heart and is not wrapped around it. However, for patients with target entirely above the heart, parVMAT seems advantageous. All patients had an adequate treatment after reviewing the summed dose on weekly rCTs.

Keywords: mediastinal lymphoma, dosimetric comparison, VMAT

2477

Digital Poster

Set-up errors and determination of planning target volume margin for IGRT for head and neck cancers

Parveen Ahlawat, Kiran Dobriyal, Sandeep Purohit, Munish Gairola, Sarthak Tandon

Rajiv Gandhi Cancer Institute and Research Centre, Radiation Oncology, New Delhi, India

Purpose/Objective: