一、材料和方法。1.95年以来,对来诊126例小儿进行X线影像观察,其最大年龄12岁,最小1岁,男73人,女53人。2.采用普通X线片进行肺部检查,拍胸部正侧位像检查小儿肺门影像变化,X光片可见双侧肺门影增浓外缘模糊,密度略均匀者111例;单侧肺门影增浓,肺门下外缘模糊不清者12例,单侧肺门影增浓外缘示片状致密影3例。3.临床症状,126例 First, materials and methods. 1.95 years since the visit of 126 cases of pediatric X-ray observation, the maximum age of 12 years old, minimum 1 year old, 73 males and 53 females. 2. The use of ordinary X-ray film for lung examination, pat the chest lateral image examination of children with hilar imaging changes, X-ray showed bilateral thickening of the outer edge of the hilum blurred, a slightly uniform density in 111 cases; unilateral lung Thickened door shadow, the outer edge of the hind ambiguous in 12 cases, unilateral hilar shadow thickening edge showed flaky compact shadow in 3 cases. Clinical symptoms, 126 cases