四种品牌CT机空间分辨率的检测与评价
Detection and Evaluation of Spatial Resolution of Four Different Branded CT Products
韩倩1
作者信息
- 1. 中国医科大学附属第一医院资产管理部(辽宁沈阳 110001)
- 折叠
摘要
目的 通过扫描头部体模,测量四种品牌CT机的空间分辨率值,并比较不同CT机之间空间分辨率值的差异,为临床应用提出合理化建议.方法 分别用四种品牌CT机对头部体模进行扫描,采用两组不同的扫描计量(常规剂量和100mAs),并分别采用两种不同重建算法(迭代和FBP)对图像进行重建,将常用的10％MTF值作为空间分辨率的评价指标.结果 通过对四组重建图像的MTF值进行比较,可以看出通用电气(GE),机型Discovery HD-750(宝石CT)的空间分辨率明显优于其它三种CT.结论 要想追求高的空间分辨率,在临床进行头部轴位扫描时,建议优先选择GE的宝石CT机进行扫描.
Abstract
Objective Through scanning head phantom,the spatial resolutions of four different branded CT products were detected,and the differences among the four CT products'spatial resolutions were compared,in order to raise some reasonable suggestions for clinical application.Methods Four different brands of CT machines were used to scan the head phantom,using two different scanning doses(conventional dose and 100mAs),and two different reconstruction algorithms(iterative and FBP)were used to reconstruct the image.The commonly used 10％MTF value was used as the evaluation index for spatial resolution.Results By comparing the MTF values of four images,it can be seen that the spatial resolution of General Electric(GE),Discovery HD-750(gemstone CT)CT is significantly better than the other three CT products.Condusion In order to achieve a high spatial resolution,it is recommended to select GE gemstone CT machine as the first choice in clinical head axial scanning.
关键词
计算机断层扫描成像设备/质量检测/Catphan500体模/空间分辨率Key words
Computed Tomography Imaging Equipment/Quality Detection/Catphan 500 CT Phantom/Spatial Resolution引用本文复制引用
出版年
2024
NETL
NSTL
万方数据