ArticleScientific reports2025
A three day coaching protocol for deep inspiration breath hold in left breast radiotherapy using active breathing control.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The deep inspiration breath-hold (DIBH) technique is recommended for left-sided breast radiotherapy to reduce heart dose exposure. However, this technique introduces uncertainties due to possible anatomical variations across successive breath-holds, requiring patient coaching to ensure reproducibility. This study aims to establish an objective coaching framework to optimize DIBH effectiveness and achieve the reproducibility of chest anatomy in left-sided breast radiotherapy. This study implemented a three-day DIBH coaching protocol using the Active Breathing Coordinator (ABC) system (Elekta AB, Sweden), with particular emphasis on the breath-hold threshold and the lung volume difference from CT images. The former was a manually configured parameter in the ABC system that reflected the stability of patient's respiratory maneuvers during coaching. The latter was used to quantify the DIBH reproducibility. Quantitative analysis demonstrated that for the 9 patients who exhibited fluctuations in their breath-hold threshold, continued coaching successfully enabled them to achieve stability. Another 14 patients maintained a consistent breath-hold threshold throughout the entire coaching process. Only one patient showed deterioration in this parameter. Additionally, the breath-hold threshold showed significant positive correlations with DIBH lung volumes: left lung (r = 0.638, p = 8.028 × 10
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