ArticleRadiation oncology (London, England)2026
Integrating static angle ports and dynamic collimator rotation in volumetric modulated arc therapy for hypofractionated whole breast irradiation in Chinese females: a single-centre dosimetric study.
Article in Radiation oncology (London, England), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.
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3 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Efficacy and cosmetic outcomes of radiotherapy modalities in early-stage breast cancer: a systematic review and network meta-analysis.Frontiers in oncology · 2026Pooled it
- Automated decision support tool for static angle modulated ports configuration in VMAT with dynamic collimator rotation for head and neck cancer.Journal of applied clinical medical physics · 2026Article
- Study on the application of thermo-optical surface monitoring + X-ray guidance system in DIBH for breast cancer.Frontiers in oncology · 2026Article
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15 authors.
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Abstract
backgroundWhole breast irradiation remains the standard in breast-conserving therapy for early-stage carcinoma. Conventional RapidArc™ plans, while dosimetrically efficient, are limited by fixed collimator position. This often leads to unnecessary irradiation to adjacent organs at risk (OARs)—particularly the contralateral breast, ipsilateral lung, and cardiac structures—resulting in increased low-dose exposure. These challenges are exacerbated in Chinese female patients due to characteristic anatomical features, such as smaller, crescent-shaped breasts, and closer heart-to-target distances. The novel RapidArc Dynamic™ system provides dynamic collimator rotation and static angle ports, enabling more beam shaping during volumetric modulated arc therapy. This study evaluates the implementation of RapidArc Dynamic™ for whole breast irradiation, comparing its dosimetric performance against conventional RapidArc™ in Chinese female patients.
methodsTen patients with early-stage left breast cancer were retrospectively replanned using RapidArc™ and RapidArc Dynamic™ on Eclipse™ (v18.1). All plans employed 6-MV photons on a TrueBeam™ linear accelerator equipped with a Millennium 120-leaf MLC, prescribed to deliver 40 Gy in 15 fractions to breast planning target volume for evaluation. Dosimetric parameters for PTV and OARs were analyzed using Wilcoxon signed-rank test.
resultsThe results demonstrated that RapidArc Dynamic™ reduced contralateral breast exposure by 5.7% in maximum dose (29.6 Gy vs. 27.9 Gy) and 27.5% in mean dose (4.0 Gy vs. 2.9 Gy). Significant doses reductions in lungs were observed with a 13% lower mean lung dose (4.6 Gy vs. 4.0 Gy). Cardiac sparing improved with 21.6% lower mean heart dose (3.7 Gy vs. 2.9 Gy).
conclusionsRapidArc Dynamic™ demonstrates significant improvement in OARs sparing, despite anatomical challenges in Chinese female patients. CLINICAL TRIAL NUMBER: Not applicable.
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