| 蔡俊涛,徐云波,李鹏.Leksell Icon型伽玛刀锥形束CT的常规质量控制与评价[J].中华放射医学与防护杂志,2023,43(1):63-67 |
| Leksell Icon型伽玛刀锥形束CT的常规质量控制与评价 |
| Conventional quality control and evaluation of Leksell Icon Gamma Knife cone-beam CT |
| 投稿时间：2022-10-08 |
| DOI：10.3760/cma.j.cn112271-20221008-00403 |
| 中文关键词: 伽玛刀 锥形束CT 质量控制 图像质量 |
| 英文关键词:Gamma knife Cone-beam CT Quality control Image quality |
| 基金项目:江苏省重点研发计划社会发展项目（BE2022720）；江苏省卫健委面上项目（M2020006） |
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| 中文摘要: |
| 目的 分析Leksell Icon型伽玛刀锥形束CT的常规质量控制结果,评估其长期稳定性。方法 使用QA TOOL plus验证锥形束CT精度;扫描Catphan 503模体,分析图像空间分辨率、对比度-噪声比和均匀性。结果 锥形束CT图像体积的最大偏差为0.09~0.17mm,均通过精度测试;预设的CT剂量指数2.5和6.3mGy扫描模式下,空间分辨率很稳定,分别为7和8lp/cm;对比度-噪声比和均匀性均符合参考要求。结论 12个月的Leksell Icon型伽玛刀锥形束CT的常规质量控制比较稳定。锥形束CT的质量控制除了参考厂商的调试基线值外,针对伽玛刀统一的分析评价标准有待进一步完善。 |
| 英文摘要: |
| Objective To analyze the conventional quality control result of Leksell Icon Gamma Knife cone-beam CT and evaluate long-term stability of cone-bem CT.Methods QA TOOL Plus was used to verify the accuracy of cone-beam CT. The phantom Catphan 503 was scanned, and the image spatial resolution, contrast to noise ratio and homogeneity were analyzed.Results The maximum deviation in image volume of cone-beam CT was 0.09-0.17mm, which passed the accuracy test. At the scanning patterns with CT dose index of 2.5 and 6.3mGy, the spatial resolution was very stable at 7 and 8 lp/cm respectively. The contrast noise ratio and uniformity meet the reference requirements.Conclusions The conventional quality control results of Leksell Icon Gamma Knife cone-beam CT are stable in 12 months. In addition to referring to the manufacturer's baseline value, the unified analysis and evaluation standard for Gamma Knife need to be further improved for the quality control of cone-beam CT. |
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