摘要
目的 探讨肺泡微石症的影像学诊断依据。方法 回顾分析 5例经活检病理证实或临床综合确诊的肺泡微石症X平片、CT、HRCT征象 ,了解病变部位和病变数量。结果 X平片示 ;两肺有弥漫分布的细沙粒状阴影 ,两下肺野较多 ,且内带较外带多 ,显示肺野密度增浓 ;两上肺分布较少 ,肺野透光度尚可 ,但较正常人密度增高。CT表现 :两肺弥漫性对称性分布细小沙粒状结节 ,中下肺较密集。部分融合成较大结节 ,形成大小不等的薄层致密带 ,CT值约 2 5 0～ 70 0HU ,多合并不同程度的肺气肿和间质纤维化。纵隔窗呈“火焰征”或“白描征”。HRCT表现 :细小结节是沿支气管血管束和胸膜下分布。结论 此病影像表现具有特征性 ,胸部平片仍是发现本病的基本手段 。
Objective To study the imaging diagnostic criterion for pulmonary alveolar microlithiasis (PAM).Methods The findings in plain film,CT,HRCT of five cases of PAM,which and been proved by lung biopsy or clinical diagnosis were retrospectively analyzed so as to learn about the location and quantity of the disease.Results On plain film, the density of mferior and inner lobes of both lungs was higher because of widespread sandy shadows.The transparency of superior lobe was passable,but still heavier than that of normal.On conventional CT,the symmetrical and widespread sandy nodules of both lungs concentraed on the inner and inferior lobes.Some nodules combined into bigger and formed thin layers of different sizes even heavy lines.The CT valus of microliths ranges from 250 to 700Hu.Mediastinal window looked like flame or white line,on HRCT,small nodules spread along the bronchovascular bundles and under the pleura.Conclusion The imaging findings of the disease are very representative.The plain film is still an elementary method to find the disease.CT,especially HRCT,is playing an important role in the diagnosis and the differential diagnosis.
出处
《临床军医杂志》
CAS
2003年第2期67-68,共2页
Clinical Journal of Medical Officers
