容积高分辨CT评价肺弥漫病变显示能力的研究

Study on volume of high resolution CT evaluating display capability of diffuse pulmonary lesions

目的观察容积高分辨CT(VHRCT)评价肺弥漫病变显示的应用及意义。方法对60例肺弥漫病变患者,分别进行VHRCT以及传统高分辨CT(CHRCT)检查。观察比较两种检查的图像质量,分析VHRCT、CHRCT在线状影及网状影、微结节影及树芽征、细支气管扩张、磨玻璃影、肺气肿5种肺弥漫病变征象的显示情况。结果两种检查在图像分辨能力以及噪声水平方面差异无统计学意义(P>0.05)。VHRCT呼吸伪影较CHRCT显著减少(P<0.05)。在无明显呼吸伪影的层面中,两种检查在线状影及网状影、微结节影及树芽征、细支气管扩张、磨玻璃影、肺气肿显示情况等方面,差异均无统计学意义(P>0.05)。结论 VHRCT评价肺弥漫病变,其能力与CHRCT较为相近,可以通过一次螺旋扫描得到全肺的高分辨率图像,用其取代CHRCT具有可行性。

Objective To observe the application and the significance of volume of high resolution CT（ VHRCT） evaluating diffuse pulmonary lesion. Methods 60 cases of diffuse pulmonary disease with VHRCT examination and the traditional high resolution CT（ CHRCT） examination respectively. Observed and compared image quality of two kinds of inspection,analyzed VHRCT,CHRCT in online shadows and reticular shadows,micro nodules andtree in bud,bronchioles,ground glass opacity,emphysema of five kinds of diffuse pulmonary disease signs display case. Results The image quality of two kinds of examination,there was no statistically significant difference in image resolution and noiselevels（ P〉0. 05）. VHRCT respiratory artifacts decreased significantly than CHRCT（ P〈0. 05）. There was no obvious respiratory artifacts level,two examination online shadows and reticular shadows,micro nodules and tree in bud,bronchioles,ground glass opacity,emphysema display aspects,the difference were not statistically significant（ P〉0. 05）.Conclusion VHRCT evaluate pulmonary diffuse disease,its capacity and CHRCT are close,can obtain high resolution images of whole lung through a helical scan,with the feasibility of replacing CHRCT.