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分析25例临床以咯血为主要症状而常规胸片为阴性的CT检查结果，全部病例CT均有异常发现。包括：支气管扩张9例，局灶性肺炎或间质性肺炎12例，支气管结石3例，肺结核1例。作者对胸片隐匿性病灶的CT表现及CT诊断价值作了讨论。CT因其高密度分辨率和横断成像无重迭等优点，对有咯血症状而胸片为阴性的肺部隐匿性病变的检查有其特殊诊断价值。
Analysis of 25 cases of clinical hemoptysis as the main symptoms of conventional chest negative CT findings, all cases of CT were abnormal findings. Including: bronchiectasis in 9 cases, focal pneumonia or interstitial pneumonia in 12 cases, bronchial stones in 3 cases, 1 case of tuberculosis. The authors discussed the CT findings and the diagnostic value of CT in occult chest radiograph. CT has its special diagnostic value for the examination of occult pulmonary lesions with hemoptysis and chest radiograph because of its high density resolution and no overlapping of transverse imaging.