Effect of treatment planning system parameters on beam modulation complexity for treatment plans with single-layer multi-leaf collimator and dual-layer stacked multi-leaf collimator

Quintero, Paulo; Cheng, Yongqiang; Benoit, David; Moore, Craig; Beavis, Andrew

Abstract

OBJECTIVE: High levels of beam modulation complexity (MC) and monitor units (MU) can compromise the plan deliverability of intensity-modulated radiotherapy treatments. Our study evaluates the effect of three treatment planning system (TPS) parameters on MC and MU using different multi-leaf collimator (MLC) architectures. METHODS: 192 volumetric modulated arc therapy plans were calculated using one virtual prostate phantom considering three main settings: (1) three TPS-parameters (Convergence; Aperture Shape Controller, ASC; and Dose Calculation Resolution, DCR) selected from Eclipse v15.6, (2) four levels of dose-sparing priority for organs at risk (OAR), and (3) two treatment units with same nominal conformity resolution and different MLC architectures (Halcyon-v2 dual-layer MLC, DL-MLC & TrueBeam single-layer MLC, SL-MLC). We use seven complexity metrics to evaluate the MC, including two new metrics for DL-MLC, assessed by their correlation with γ passing rate (GPR) analysis. RESULTS: DL-MLC plans demonstrated lower dose-sparing values than SL-MLC plans (p

Citation

Quintero, P., Cheng, Y., Benoit, D., Moore, C., & Beavis, A. (2021). Effect of treatment planning system parameters on beam modulation complexity for treatment plans with single-layer multi-leaf collimator and dual-layer stacked multi-leaf collimator. British Journal of Radiology, 94(1122), Article 20201011. https://doi.org/10.1259/bjr.20201011

• Journal Article Type: Article
• Acceptance Date: Mar 18, 2021
• Online Publication Date: Apr 29, 2021
• Publication Date: Jun 1, 2021
• Deposit Date: Apr 7, 2022
• Publicly Available Date: Apr 30, 2022
• Journal: The British journal of radiology
• Print ISSN: 0007-1285
• Electronic ISSN: 1748-880X
• Publisher: British Institute of Radiology
• Peer Reviewed: Peer Reviewed
• Volume: 94
• Issue: 1122
• Article Number: 20201011
• DOI: https://doi.org/10.1259/bjr.20201011
• Public URL: https://hull-repository.worktribe.com/output/3809361