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螺旋CT（Spriral CT）在胸部现已广泛应用，由于其数据的采集可在一次屏气过程中完成整个胸部的扫描，故避免因呼吸造成层面的遗漏和重叠，更可避免运动伪影，因此又称容积扫描［1］。采集的数据资料可以做回顾性的重建，因而能够获得高质量的三维重建图像（SSD）和仿真内镜技?
Spiral CT (Spiral CT) has been widely used in the chest, because the acquisition of its data can be completed in a breath-hold process the entire chest scan, it avoids the level of breathing caused by the omission and overlap, but also to avoid motion artifacts, and therefore Weigh volume scan [1]. The collected data can be retrospectively reconstructed so that high-quality 3D reconstruction images (SSDs) and simulated endoscopy can be obtained.