| 探讨宝石CT靶重建模式显示活体肺组织结构的优势 |
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| 引用本文： | 陈麦林,刘玉良,李晓婷,齐丽萍,孙应实.探讨宝石CT靶重建模式显示活体肺组织结构的优势[J].CT理论与应用研究,2020,29(1):61-69. |
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| 作者姓名： | 陈麦林 刘玉良 李晓婷 齐丽萍 孙应实 |
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| 作者单位： | 北京大学肿瘤医院影像科, 北京大学肿瘤医院暨北京市肿瘤防治研究所, 恶性肿瘤发病机制及转化研究教育部重点实验室, 北京 100041 |
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| 摘 要： | 目的:比较肺CT靶重建（局部小扫描视野（FOV）薄层CT成像）和常规肺CT图像的质量以及对正常活体肺结构的显示情况。方法:对74例受检者分别行常规肺CT扫描（5mm）及靶重建（FOV 20cm，层厚1.25mm）。两名放射科医师分别判定常规肺CT成像、正常肺野小FOV薄层CT成像的图像质量:肺小叶结构、肺动静脉-支气管分支的显示（1～4级）及判断信心强度；3级和4级图像以小FOV薄层CT成像（1.25mm）显示数较多者作为标准，进一步判断常规肺CT扫描（5mm）成像的敏感性，两名观察者间的一致性做Kappa检验。结果:1级和2级图像质量在常规肺CT扫描和肺小FOV薄层CT成像间无统计学意义；3级和4级图像质量，肺小FOV薄层靶重建CT成像明显优于常规肺CT扫描，在两名观察者间均有统计学差异（P<0.05）；参照肺小FOV靶重建成像，常规肺CT扫描（5mm）成像，3级图像敏感性分别为97.1%、98.6%；4级图像敏感性分别为80.8%和85.3%。诊断信心水平明显提高（P<0.05）。在肺小FOV靶重建CT成像、常规肺CT成像上的图像质量的判断，两名观察者间具有较好的一致性（k=0.717，0.746）。结论:肺小FOV薄层CT成像较常规CT图像，能增加正常肺微细结构的显示能力和增加观察者判断信心。
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| 关 键 词： | 计算机断层成像 肺 靶重建 |
| 收稿时间： | 2019-09-24 |
To Explore the Advantage of Gemstone CT Target Reconstruction in Displaying the Tissue Structure of Living Lung |
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| Affiliation: | Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Radiology of department, Peking University Cancer Hospital & Institute, Beijing 100041, China |
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| Abstract: | objective:to compare the image quality and the display of the structure of normal lung between lung CT targeted reconstruction (local small FOV thin layer CT imaging) and conventional lung CT. Methods:74 cases of subjects respectively routine pulmonary CT scan (5mm) and targeted reconstruction (FOV:20 cm, thickness:1.25mm). Two radiologists respectively determine normal lung CT imaging, targeted reconstruction image quality:pulmonary lobule structure, pulmonary vessels and bronchial branches display (grade 1~4) and judge the strength of confidence. The targeted reconstruction with 1.25-mm sections and small FOV showed more was used as the gold standard. and further determine the sensitivity of targeted reconstruction and conventional lung CT scan imaging (5mm), the consistency between two observers to make Kappa test. Results:Level 1 and 2 image quality of conventional lung CT scan and targeted reconstruction showed no significant statistical differences. Level 3 and level 4 image quality, targeted reconstruction is superior to the conventional lung CT scan, the differences between two observers was statistically significant (P<0.05); According to the targeted reconstruction imaging, Conventional pulmonary CT scan imaging (5mm) Level 3 image's sensitivity was 97.1%, 98.6%, respectively; Level 4 image's sensitivity was 80.8%, 85.3% respectively. And diagnostic confidence level increased significantly (P<0.05). Image quality judgment has a good consistency for targeted reconstruction, conventional lung CT between two observers (k=0.717, 0.746). Conclusion:Compared with conventional CT images, targeted reconstruction images can increase the normal display rate of pulmonary microstructure, the confidence of the judgment. |
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