The large noduli generally located at the periphery of lung or under the pleura and noduli were focused together, vacuole sign was present in 72.7% cases and the noduli were around the vacuole, and lobulated. 大的融合病灶常位于肺周或胸膜下,呈多结节聚集,粟粒结节72.7%的病例有空泡征,结节分布在空泡周围,外缘分叶。