CT定位下肺大泡减容术前后的CT肺功能分析

Comparison of the diagnostic value by CT pulmonary function between pre-and post-operation with volume-reduced bullae underwent CT locating

目的:研究定量CT肺功能对肺大泡减容术前及术后的肺功能评估。方法:18例肺大泡病例进行CT定位下肺大泡减容术,分别在术前、术后1个月及6个月行CT扫描,利用CT肺功能定量分析软件分析图像数据并得出相应CT肺功能参数值:CT值、像素指数(PI,分为-1024～-980,-980～-910,-910～-800,-800～-700,>-700五区)、容积,比较各组参数的差异。结果:①CT肺定量能检出介入术前肺大泡病灶的大小、数目及位置,并能顺利地用Volume软件测出欲减容的肺大泡容积;②CT肺功能术后与术前比较,肺总容积、PI-1024～-980明显减少,平均CT值、PI-910～-800明显增加(P<0.01)。结论:CT定位下肺大泡减容术是治疗肺大泡的途径之一,定量CT肺功能可对肺大泡减容术前及术后的肺功能进行评估。

Objective：To assess the diagnostic value between preoperative and post-op with volume-reduced bullae by quantitative CT pulmonary function.Methods：Of 18 patients with bullae were operated under CT locating, and scaned underwent cr before operation, 1 month and 6 months later after operation. All CT source images were analyzed by pulmonary quantitative software and the parameters included the mean attenuation value, the attenuation value of lung field, pixel indices PI （ - 1024 ～ - 980, - 980 ～ - 910, - 910 ～ - 800, - 800～ - 700, 〉 - 700）, total lung volume.Results：① The size, number, location of bullae can be detected by quantitation cr pulmonary function,and the volume of bullae also can be measured by volume software; ② Comparison of quantitative CT pulmonary function betwen preoperative and post-op with bullae： total lung volume and PI - 1024 ～ - 980 significantly decreased after operation, while the mean attenuation value, PI - 910 ～ - 800 were significantly increased （ P 〈 0.01）. Conclusion：It is a way of curing bullae to reduce volume under CT locating. And lung function can be evaluated between preoperative and post-op of bullae by CT pulmonary function.