[Method of Reducing Low-Dose Lung Volume in VMAT on Central Lung Cancer Planning].

Q4 Medicine

中国医疗器械杂志 Pub Date : 2025-03-30 DOI:10.12455/j.issn.1671-7104.240237

Haojia Zhang, Yi Zhang, Haijie Jin, Shihu You, Jiaying Gan, Yinxiang Hu

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引用次数: 0

Abstract

Objective: To study effective methods for reducing lung V₅, V₁₀, and mean lung dose (MLD) in the design of volumetric modulated arc therapy for central lung cancer by using different arc configurations and dose-limiting blocks designs.

Methods: Five groups of plans were designed for the enrolled patients. Group A used a full-arc field. Group B used a partial-arc field. Groups C, D, and E used full-arc fields with vertical-length, semi-ring, and triangular dose-limiting blocks added respectively. The dosimetric similarities of target areas and the dosimetric differences in lung V₅, V₁₀, V₂₀, and MLD among the groups were compared.

Results: Compared with group A, groups B, C, D, and E had decreased homogeneity and conformity of the target area, but significantly lower V₅ and V₁₀ of the whole lung. The MLD of groups C, D, and E was lower than that of group A.

Conclusion: Using a full-arc field combined with dose-limiting blocks can effectively reduce lung V₅, V₁₀, MLD, and monitor units (MU).

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[降低VMAT低剂量肺容积对中枢性肺癌规划的影响]。

目的：通过不同的弧线配置和剂量限制块设计，探讨在容积调节弧线治疗中降低肺V5、V10和平均肺剂量（MLD）的有效方法。方法：对入组患者设计5组方案。A组采用全弧场。B组采用部分弧场。C组、D组和E组采用全弧场，分别添加垂直长度、半环形和三角形剂量限制块。比较各组肺V5、V10、V20、MLD靶区剂量学相似性及差异。结果：与A组比较，B、C、D、E组靶区均匀性、符合性降低，全肺V5、V10明显降低。C、D、E组MLD均低于a组。结论：全弧场联合剂量限制阻滞可有效降低肺V5、V10、MLD及监护单位（MU）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

中国医疗器械杂志 Medicine-Medicine (all)

CiteScore

0.40

自引率

0.00%

发文量

8086

期刊介绍： Chinese Journal of Medical Instrumentation mainly reports on the development, progress, research and development, production, clinical application, management, and maintenance of medical devices and biomedical engineering. Its aim is to promote the exchange of information on medical devices and biomedical engineering in China and turn the journal into a high-quality academic journal that leads academic directions and advocates academic debates.