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首页> 外文期刊>Radiotherapy and oncology: Journal of the European Society for Therapeutic Radiology and Oncology >Delineation variation of lymph node stations for treatment planning in lung cancer radiotherapy.
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Delineation variation of lymph node stations for treatment planning in lung cancer radiotherapy.

机译：肺癌放疗中用于治疗计划的淋巴结站的轮廓变化。

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摘要

PURPOSE: To assess the variability among clinicians in the delineation of mediastinal and hilar lymph node stations (LNS) according to the published recommendations in the treatment planning of elective nodal irradiation for lung cancer. METHODS: Nine observers delineated on axial CT scans of five cases the LNS according to the guidelines of the published Atlas. Next, the Volumes of Consensus (VC) - fitting strictly the guidelines - for each LNS and case were collectively defined. Volume of Intersection (VI) as the overlap of the Delineated Volume (DV) for each LNS, case and observer with respective VC was computed. The Concordance Index (CI) for respective LNS and observers was defined as "VI/VCx100%". The Discordance Index (DI) for respective LNS and observers was defined as "(1-VI/VD)x100%". RESULTS: Mean values of CI and DI for all observers were 69% and 36%, respectively. For five radiation oncologists who used to work as a team the ways of delineation were similar. The poorest reproducibility wasshown for LNS 5, 7, 10R, and 10L. CONCLUSIONS: Although detailed guidelines are used there is still substantial room for improvement. More training in the use of the Atlas is recommended.
机译：目的：根据已发表的肺癌择期淋巴结治疗规划中的建议，评估临床医生在纵隔和肺门淋巴结站（LNS）划定中的差异。方法：根据已发表的Atlas指南，对9例LNS的轴向CT扫描划定了9位观察员。接下来，对每个LNS和案例的共识量（VC）（严格遵循准则）进行了统一定义。计算每个LNS，案例和观察者与各自VC的交叉体积（VI），作为所描绘体积（DV）的重叠。各个LNS和观察者的一致性指数（CI）定义为“ VI / VCx100％”。各个LNS和观察者的不一致指数（DI）被定义为“（1-VI / VD）x100％”。结果：所有观察者的CI和DI平均值分别为69％和36％。对于曾经作为一个团队工作的五位放射肿瘤学家，划定方法是相似的。 LNS 5、7、10R和10L的重现性最差。结论：尽管使用了详细的指南，但仍有很大的改进空间。建议对Atlas的使用进行更多培训。

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