ESTRO 2024 - Abstract Book

S3590

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

ESTRO 2024

Conclusion:

In the absence of a larger patient cohort, the dosimetric differences found make us consider the need to perform some type of respiratory control during treatments involving the GEJ area.

Keywords: Diaphragmatic movement, respiratory control

1639

Digital Poster

Robust VMAT dose planning on breast patients and selection of optimization bolus.

clara navarro ibarra, Francisco Clemente Clemente Gutierrez, Angel Forner Forner, Miguel Angel Diez Gallego, Jose Angel Merino Gestoso, Noelia Solis Preciado, Maria Luisa Chapel Gomez, Paz Garcia Acilu Laa

University Hospital Toledo, Radiotherapy, Toledo, Spain

Purpose/Objective:

The use of volumetric modulated arc therapy (VMAT) technique for breast cancer RT is becoming a standard in breast patients with axillary node involvement. However, VMAT technique has raised slight concern on the accuracy of treatment delivery due to inter- and intrafractional motion during treatment that is highly modulated [1], compared to static fields. In addition, the perpendicular beam entrance directions in the VMAT technique may decrease the skin dose compared to tangential beams

The aim of the current study was to investigate VMAT breast planning robustness on breast patients with axillary lymph node. The dose near the surface was assessed in the presence of patient movement using the "plan