| 杨晶,陈秘,梁志文,等.射波刀Iris可变准直器孔径大小的重复性评价[J].中华放射医学与防护杂志,2016,36(4):291-293.Yang Jing,Chen Mi,Liang Zhiwen,et al.Evaluation on repeatability of the aperture sizes of CyberKnife VSITM Iris collimator[J].Chin J Radiol Med Prot,2016,36(4):291-293 |
| 射波刀Iris可变准直器孔径大小的重复性评价 |
| Evaluation on repeatability of the aperture sizes of CyberKnife VSITM Iris collimator |
| 投稿时间：2015-12-09 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.04.012 |
| 中文关键词: 射波刀 Iris可变准直器 胶片 |
| 英文关键词:CyberKnife Iris variable aperture collimator Film |
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| 中文摘要: |
| 目的 开展射波刀Iris可变准直器的研究工作,评价射束大小的可重复性。方法 在射波刀等中心800 mm处辐照胶片,扫描曝光后的胶片并使用Iris 质量保证(QA)软件获取胶片上的射束信息。结果 Iris可变准直器在5~40 mm大小范围内标准偏差<0.11 mm,在50、60 mm的情况下标准偏差<0.19 mm。结论 射波刀Iris可变准直器孔径大小重复性良好。 |
| 英文摘要: |
| Objective To evaluate the repeatability of the aperture sizes based on the Iris variable aperture collimator (Iris collimator) of CyberKnife VSITM. Methods Radiochromic films were placed at 800 mm of source-to-axis distance (SAD), and Iris quality assurance (QA) software was used to extract the information from the digital images, which were exposured by X-ray beams. Results The average aperture accuracy of Iris collimator was better than 0.11 mm over the beam range 5-40 mm, and the accuracy for 50 mm and 60 mm beams was within 0.19 mm. Conclusions The results suggest a good repeatability of aperture sizes for the CyberKnife VSITM Iris collimator. |
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