肺气肿的诊断：CT和肺功能检查的比较

Emphysema:Comparison of CT and PuImonary Function Tests

作者比较了１１７例的ＣＴ扫描（其中５０例同时加作了ＨＲＣＴ扫描）和肺功能检查在检出肺气肿上的能力。结果显示ＣＴ和肺功能检查对肺气肿的检出率分别为７８．２６％和４７．８２％，两者有极显著的差异。６６．６７％（１６１２４）肺功能检查无肺气肿的病例，ＣＴ都发现了肺气肿征象，说明ＣＴ在检出轻度、早期肺气肿上较肺功能检查敏感。在５０例常规ＣＴ和ＨＲＣＴ的比较中发现３５．８％常规ＣＴ正常的病例，在ＨＲＣＴ上都检出了肺气肿。２０．１％常规ＣＴ诊断为轻度肺气肿的病例中，ＨＲＣＴ上为中度肺气肿，说明在肺气肿的诊断上ＨＲＣＴ较常规ＣＴ敏感。

The authors. tudied 117 cases. who had concurrent CT and pulmonary function tests(PFT). 50 of them also had simultaneous HRCT scans. to assess the ability of CT in detecting emphysema as compared with PFT.The results showed that detectability of pulmonary emphysema by CT and PFT were 78.26%and 47.82%respectively. This difference was very significant(P<0.01). There was CT evidence of emphysema in 66. 67%(16/24 ) of cases without abnormal PEF findings. These results indicated that CT was more sensitive than PFT in detecting mild emphysema.The comparison of CT and HRCT in 50 cases showed that 35.8%who were normal on conventional CT scans demonstrated emphysema on HRCT scans implying that HRCT was superior to convention-al CT in the diagnosis of emphysema.