早在 1990年Naidich等[1] 就提出胸部低剂量螺旋CT的概念 ,并在临床上应用。由于肺本身为含气组织 ,肺泡内空气与周围软组织的对比度高 ,因此 ,在胸部使用低剂量CT扫描就可检测出肺组织的实变。近几年来 ,临床上有关低剂量螺旋CT在胸部病变中的应用研究陆续报道 ,作者就近年来 As early as 1990 Naidich et al [1] proposed the concept of low-dose chest CT, and its clinical application. Since the lung itself is a gas-bearing tissue, the alveolar air has a high contrast with the surrounding soft tissue. Therefore, low-dose CT scans on the chest can detect the consolidation of the lung tissue. In recent years, the clinical application of low-dose spiral CT chest lesions have been reported in succession, the author in recent years