窗技术是CT检查中用以观察不同密度的正常组织或病变的显示技术,包括窗宽和窗位。窗技术应用是否得当,直接影响CT图像的显示质量。本文就窗技术应用中的一些体会谈一点粗浅体会。 一、窗宽、窗位与CT值:选择窗宽、窗位的依据是组织或病变的密度。CT值则是CT检查中以表达组织密度的统一单位。因之,窗宽、窗位大小的选择首无要通过测定组织的CT值来进行。 在CT图像上,各个象素显示的CT值是代表相应体素整体的CT值。如一个体素内含有两种以上横行走行的结构时,则CT值不能如实地反映各组织结构的CT值。且影响CT值的因素较多,部分容积效应 The window technique is a display technique used to observe normal tissue or lesions of different densities in CT examination, including window width and window level. Window technology is properly applied, a direct impact on CT image display quality. This article on window technology applications some of the experience to talk a bit superficial experience. First, the window width, window level and CT value: select the window width, window level is based on the density of the tissue or lesion. CT value is the CT unit to express the density of the unit. Therefore, the window width, window size of the first choice to determine the organization by CT value to carry out. On the CT image, the CT values ​​displayed by the individual pixels represent the CT values ​​of the corresponding voxels as a whole. If a voxel contains more than two kinds of transverse walk structure, the CT value can not faithfully reflect the CT value of each structure. And factors that affect the CT value more, some volume effect