加权窗宽及加权窗位的选择在双源CT双能门静脉成像中的应用价值

王晓梅; 边杰; 杨俊武; 白建新; 张策; 张健飞; 隋鸿锦

中国临床医学影像杂志 ›› 2013, Vol. 24 ›› Issue (8) : 560-563.

论著

加权窗宽及加权窗位的选择在双源CT双能门静脉成像中的应用价值

王晓梅1，边杰1，杨俊武1，白建新1，张策1，张健飞2，隋鸿锦2

作者信息 +

The applications of blending width and blending center in dual energy portal vein imaging with DSCT

WANG Xiao-mei1, BIAN Jie1, YANG Jun-wu1, BAI Jian-xin1, ZHANG Ce1, ZHANG Jian-fei2, SUI Hong-jin2

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文章历史 +

摘要

目的：探讨加权窗宽（Blending width，BW）及加权窗位（Blending center，BC）的选择在双源CT双能门静脉成像中的应用价值。方法：随机选取30例患者门静脉期采用双源双能扫描后进行不同BW、BC进行优化对比出6组图像，加权系数0.3的原始图像作为对照组图像，分别测得7组门静脉主干ROI及肝脏ROI的CT值及二者之差的CT值，并进行统计学分析。结果：6组优化均和对照组之间存在统计学差异，优化对比后使得门静脉主干ROI及肝脏ROI的CT值及二者之差的CT值增高和增大；6组优化对比中在BW=100~200、BC=50~100之间存在3组，他们的CT值升高最明显，但组间没有统计学差异，而与此范围之外的其他各组存在着统计学差异。结论：双源CT优化对比可以在不增加对比剂使用剂量的同时提高门静脉图像质量，在优化对比的参数上目前推荐使用BW=100~200、BC=50~100这个范围。

Abstract

Objective: To assess the applications of blending width(BW) and blending center(BC) in dual energy portal vein imaging with DSCT. Method: The dual energy scan was performed during the portal venous phase on 30 randomly selected patients. During this course, through adjusting the blending width and blending center, 6 groups of images were optimized and contrasted. The original images which weighting coefficient were 0.3 acted as the control group images. CT value of region of interest(ROI) of the portal vein trunk and the liver were measured in these 7 groups. And the differences of CT value between the two ROI were separately measured and analyzed. Results: The results showed that there were statistic differences between the 6 optimized groups and control group images. The optimizing and contrasting made the CT value of the portal vein trunk and the liver higher and made the differences of CT value between the two ROI larger. There were 3 optimizing and contrasting groups in the range of BW=100~200, BC=50~100. The increasing of the CT value was most obvious. There were differences between the 3 groups and the other groups, but there were no statistic differences among the 3 groups. Conclusion: The optimizing and contrasting imaging of DSCT can improve the image quality of portal vein without increase the dosage of contrast-medium. The range of BW=100~200, BC=50~100 are the recommend parameters for optimizing and contrasting of DSCT.

导出引用

王晓梅;边杰;杨俊武;白建新;张策;张健飞;隋鸿锦. 加权窗宽及加权窗位的选择在双源CT双能门静脉成像中的应用价值[J]. 中国临床医学影像杂志. 2013, 24(8): 560-563

WANG Xiao-mei;BIAN Jie;YANG Jun-wu;BAI Jian-xin;ZHANG Ce;ZHANG Jian-fei;SUI Hong-jin. The applications of blending width and blending center in dual energy portal vein imaging with DSCT[J]. Journal of China Clinic Medical Imaging. 2013, 24(8): 560-563

中图分类号： Ｒ575 Ｒ814.42