ESTRO 2022 - Abstract Book

S1494

Abstract book

ESTRO 2022

Conclusion Even during brief treatment sessions with a highly streamlined workflow of less than 5 minutes, patient baseline drift is not negligible. Drift is largest during the initial 2 minutes after completion of patient setup, during which verification imaging and evaluation is performed. Surface scanning can detect patient motion during every phase of the intra-bore workflow and will be invaluable for online adaptive treatments.

PO-1694 In-bore surface guided DIBH breast VMAT treatments in a closed-bore linac

L. Delombaerde 1,2 , S. Petillion 2 , C. Weltens 1,2 , T. Depuydt 1,2

1 KU Leuven, Department of Oncology, Leuven, Belgium; 2 UZ Leuven, Department of Radiation Oncology, Leuven, Belgium

Purpose or Objective An in-bore surface scanning system to monitor patients in the closed-bore linac Halcyon (Varian Medical Systems) has recently become available, AlignRT InBore (VisionRT Ltd.). We treated 4 patients in deep-inspiration breath-hold (DIBH) and assessed inter and intra fraction motion and workflow efficiency.

Materials and Methods