Kobika Sritharan, Hafid Akhiat, Declan Cahill, Seungtaek Choi, Ananya Choudhury, Peter Chung, Juan Diaz, Lars Dysager, William Hall, Robert Huddart, Linda G W Kerkmeijer, Colleen Lawton, Jonathan Mohajer, Julia Murray, Christina J Nyborg, Floris J Pos, Michele Rigo, Tine Schytte, Mark Sidhom, Aslam Sohaib, Alex Tan, Jochem van der Voort van Zyp, Danny Vesprini, Michael J Zelefsky, Alison C Tree
PURPOSE: The use of magnetic resonance imaging (MRI) in radiotherapy planning is becoming more widespread, particularly with the emergence of MRI-guided radiotherapy systems. Existing guidelines for defining the prostate bed clinical target volume (CTV) show considerable heterogeneity. This study aimed to establish baseline interobserver variability (IOV) for prostate bed CTV contouring on MRI, develop international consensus guidelines, and evaluate its effect on IOV. METHODS AND MATERIALS: Participants delineated the CTV on 3 MRI scans, obtained from the Elekta Unity MR-Linac, as per their normal practice...
February 1, 2024: International Journal of Radiation Oncology, Biology, Physics