山西医科大学学报2017，Vol.48Issue(6)：566-570,5.DOI:10.13753/j.issn.1007-6611.2017.06.012
自动测量法评估冠状动脉管腔内密度衰减梯度准确性的研究
Accuracy of automated method in computed tomography coronary angiography in the evaluation of transluminal attenuation gradient
摘要
Abstract
Objective To evaluate the accuracy of the automated method for measuring the transluminal attenuation gradient (TAG) value,and to assess the influence of age,sex,and different branch of coronary artery on the TAG value.Methods Totally 50 patients underwent CT coronary angiography with 320 row CT scanner.The automated method and manual method were applied to measure the TAG value of anterior descending branch (LAD),left circumflex (LCx) and right coronary artery (RCA).The difference of TAG was compared in patients with different age,sex,and branch of coronary artery.The accuracy of the automated method and the inter-observer agreement were assessed by Bland-Altman and linear regression analysis.Results TAG was lower in female than in male.TAG was lower in elderly group than in middle-age group.The TAG in RCA was slightly higher than that in LAD and LCx.The analysis time per artery of the automated method was shortened by 64％ compared to the manual method.Bland-Altman analysis showed low mean difference(-1.0 HU/cm) between the automated method and the manual method.Automated method and manual method had high interobserver agreement.Conclusion Automated method could reduce the computation time with high accuracy and reproducibility.关键词
320排CT/CT冠状动脉造影/管腔内密度衰减梯度/CT值Key words
320 row CT/CT coronary angiography/transluminal attenuation gradient/Hounsfield units分类
医药卫生引用本文复制引用
李娇娇,张斌,刘迪,李传贵,李晓东,郎颖涛..自动测量法评估冠状动脉管腔内密度衰减梯度准确性的研究[J].山西医科大学学报,2017,48(6):566-570,5.基金项目
张家口市科技攻关计划资助项目(1521094D) （1521094D）
