ＣＴ对肺癌的诊断具有重要意义。其诊断步骤首先明确肺部有无病灶，其次做出定性诊断，最后精确定位。Ｘ线检查对肺部微小结节常受一定限制，病灶小容易漏诊，尤其是一些隐匿部位的病变易被心影、膈肌和肋骨遮盖，难以显示［１］。ＣＴ扫描则以高度的分辨力和图像无重叠的... CT diagnosis of lung cancer is of great significance. The diagnostic steps first clear whether the lung lesions, followed by make a qualitative diagnosis, the last pinpointing. X-ray examination of lung nodules are often subject to certain restrictions, the lesser easy to miss, especially in some hidden parts of the lesion easily affected by heart shadow, diaphragm and ribs to cover, difficult to show [1]. CT scan with a high degree of resolution and image without overlapping ...