Technical Note: Investigating of dosimetric leaf gap and leaf transmission factor variations across gantry and collimator angles in volumetric modulation arc therapy.
Aram RostamiMojtaba BarzegarMuhammad UsmanSatheesh Prasad PaloorAbbass Yousef MkannaAlla Fuad Al-SabahiRabih Wafiq HammoudPublished in: Journal of applied clinical medical physics (2024)
Our study highlights the variability of DLG with gantry angle alterations, contrary to Varian guidelines recommending DLG measurements at zero gantry angle only. We advocate for utilizing an averaged DLG value from measurements across multiple gantry angles, as outlined in our methodology.