摘要
目的 :复习文献 ,并进一步讨论常规剂量下影响CT检出肺结节的因素。方法 :选择肺转移瘤 2 0例 ,分别在不同层厚、重建间隔以及螺距情况下扫描 ,统计在每一扫描条件下检出的肺结节的大小、数量、部位 ,讨论扫描条件、结节大小、结节部位与肺结节检出率之间的关系。结果 :扫描层厚薄、重建间隔小、螺距值小、检出的肺结节数越多 ,更多的是提高了微结节的检出 ;与肺血管影、肺门影、心旁纵隔影、横膈影重叠的肺结节容易漏检。结论 :常规剂量扫描条件下 ,扫描层厚、重建间隔、螺距、结节大小、结节位置均可影响结节的检出。
Objective:To review literature and further evaluate the factors influencing lung nodules detection by standard dose scanning.Methods:20 patients with lung metastasis were scanned by CT with different schemes,including different slice thickness,different reconstruction interval and pitch.The nodules size,number and position,were measured and the correlativity of scan schemes,nodule size,nodule position and the detecting rate of the nodules were observed.Results:The thinner the slice thickness and the smaller the reconstruction interval and the smaller the pitch,the more nodules are found out,mainly more tiny nodules are found out;nodules adjacenting to or overlapping on pulmonary vessels,hilum of lung,heart border and diagram are easly not found out.Conclusion:By standard dose schemes,the slice thickness,reconstruction interval,pitch,nodule size and position all influence the defection of the lung nodules.
出处
《医学影像学杂志》
2004年第2期98-100,共3页
Journal of Medical Imaging
