ArticleReports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology2025
Linear accelerator selection: impact on feasibility dose-volume histograms and practicality in dose reduction for organs at risk during prostate volumetric-modulated arc therapy.
Article in Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Distinguishing model- and environment-related effects in knowledge-based planning of moderately hypofractionated prostate VMAT.Physical and engineering sciences in medicine · 2026Article
- Systematic comparison of manual, knowledge-based, and feasibility DVH approaches for prostate VMAT: stability and robustness.Physical and engineering sciences in medicine · 2026Article
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5 authors.
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Abstract
Background: The quality of volumetric-modulated arc therapy (VMAT) plans depends on the planner's expertise. A feasibility dose-volume histogram (FDVH) may help reduce planning variability. Materials and methods: This study evaluated the impact of two linear accelerators - Halcyon and TrueBeam - on FDVH in prostate VMAT planning and their effectiveness in reducing doses to organs at risk (OARs). VMAT plans were generated for 30 patients with prostate cancer, with planning target volume excluding the rectum (PTV-R) and OAR contours created by three planners. An FDVH was created, and plans were classified as "difficult" (0 < F ≤ 0.1) based on OAR dose reduction. Results: The D98% and D2% of PTV-R were analyzed, showing that TrueBeam had a higher mean dose at D98% and a lower mean dose at D2% compared to Halcyon, but these differences were not statistically significant (D98%: p = 0.123, D2%: p = 0.167). For the rectum, TrueBeam resulted in significantly lower doses for all dose constraints compared to Halcyon (p < 0.001). In the bladder, TrueBeam showed a significantly lower dose at V40Gy (p < 0.001). The upper limits of feasible F-values were 0.00-0.12 (TrueBeam) and 0.00-0.17 (Halcyon) for the rectum, and 0.01-0.20 (TrueBeam) and 0.00-0.20 (Halcyon) for the bladder, depending on dose parameters. Conclusions: These findings highlight that the choice of the linear accelerator significantly impacts OAR dose reduction. In prostate VMAT, TrueBeam demonstrated superior rectal and bladder dose reduction compared to Halcyon, underscoring the importance of selecting the appropriate device to optimize treatment planning and minimize variability.
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