作者概述了高分辨力CT(HRCT)对慢性浸润性肺部疾病(CILD)诊断的特异性。胸部X线检查虽有助于CILD的诊断,但大多不能确诊。Mcloud等回顾了经活检证实的365例CILD病人的X线诊断,确诊者仅占50％。而Mathieson等比较了X线检查和CT在118例CILD病人中的诊断准确性,其CT确诊率为93％,X线检查为79％;Grenier等研究了140例经证实的CILD病人,显示HRCT的 The authors outline the specificity of high resolution CT (HRCT) for the diagnosis of chronic infiltrative pulmonary disease (CILD). Chest X-ray examination may contribute to the diagnosis of CILD, but most can not be confirmed. Mcloud et al. Reviewed the X-ray diagnosis of 365 CILD patients confirmed by biopsy, with only 50% of those diagnosed. And Mathieson et al compared the diagnostic accuracy of X-ray examination and CT in 118 cases of CILD patients. The diagnosis rate of CT was 93% and the X-ray examination was 79%. Grenier et al studied 140 cases of confirmed CILD patients and showed that HRCT of