北京生物医学工程2012，Vol.31Issue(1)：36-39,4.DOI:10.3969/ j.issn. 1002-3208(2012)01.08.
一种可变系数的对数脑血管减影算法研究
Logarithmic subtraction algorithm of variable coefficient on cerebral blood vessels
欧阳丽蓉 1邓振生 1严昂2
作者信息
- 1. 中南大学地球科学与信息物理学院,长沙410083
- 2. 中南大学湘雅医院,长沙410008
- 折叠
摘要
Abstract
Objective Since the non-vascular structures can hardly be fully expelled from the blood vessels in the image of digital subtraction angiography(DSA),which seriously interferes the analysis and diagnosis of blood vessels,this study looks for a subtraction method suitable for cerebral blood vessels from DSA.Methods According to the absorbing teatures of X-ray in human bodies,a logarithmic subtraction algorithm of variable coefficient was proposed.Logarithmic transtormation was carried on the images of before-and after-angiography respectively,which were then subtracted.Then,a self-adaptive expanded coefficient was used to expand the range of the gray level of the subtraction image.Results Direct subtraction,ordinary logarithmic subtraction and the proposed method were performed on the clinical angiography images respectively in this paper.It showed that the proposed method could obtain images with less non-vascular structures and better contrast than the other two methods.Conclusions The logarithmic subtraction algorithm of variable coefficient might effectively eliminate or decrease background noises,which was helptul to obtain blood vessel images with uniform gray levels and good contrast.关键词
数字减影血管造影/可变系数/对数变换Key words
digital subtraction angiography/variable coefficient/logarithmic transformation分类
医药卫生引用本文复制引用
欧阳丽蓉,邓振生,严昂..一种可变系数的对数脑血管减影算法研究[J].北京生物医学工程,2012,31(1):36-39,4.
