| 16层螺旋CT冠状动脉图像质量评估 |
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| 引用本文： | 胡斌,陈祥民,张雪辉,乔炳龙,孙其勤.16层螺旋CT冠状动脉图像质量评估[J].北京生物医学工程,2009,28(4):386-390. |
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| 作者姓名： | 胡斌 陈祥民 张雪辉 乔炳龙 孙其勤 |
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| 作者单位： | 青岛大学医学院附属临床医院青岛市市立医院,山东青岛,266001;青岛大学医学院附属临床医院青岛市市立医院,山东青岛,266001;青岛大学医学院附属临床医院青岛市市立医院,山东青岛,266001;青岛大学医学院附属临床医院青岛市市立医院,山东青岛,266001;青岛大学医学院附属临床医院青岛市市立医院,山东青岛,266001 |
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| 摘 要： | 目的量化评估16层螺旋CT冠状动脉各分支图像质量，探讨冠状动脉CT成像的临床应用效果。方法采用16层螺旋CT对102例患者行回顾性心电门控冠状动脉成像，男60例，女42例，平均年龄（57．8±9．4）岁，平均心率（62．8±10．2）次／min。心率〈60次／min（n=40）为I组，60～70次／min（n=35）为Ⅱ组，〉70次／min（n=27）为Ⅲ组。4条冠状动脉分支（左主干、左前降支、左回旋支、右冠状动脉）分别用于图像质量分析。扫描原始数据以间隔10％在20％～80％时相分别回顾性重建冠状动脉图像，用横断面、曲面重建、容积再现等方法对冠状动脉显示率评估。用曲面重建方法测量冠状动脉各分支长度及近段和远段对比噪声比。结果①冠状动脉各分支平均显示长度：左主干（10．9±3．0）mm，左前降支（130．3±29．7）mm，左回旋支（82．8±19．8）mm，右冠状动脉（150．5±27．5）mm；②Ⅰ组60％和70％为最佳时相图像质量优，Ⅱ组60％时相为最佳时相图像质量优，Ⅲ组RCA较优的时相为40％，LM、LAD、LCX较优时相为60％。③所有冠状动脉分支平均对比噪声比10．9±3．2。结论16层螺旋CT有较好质量的冠状动脉图像，心率和时相影响冠状动脉的成像质量。
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| 关 键 词： | 16层CT 冠状动脉血管造影 心率 重建时相 |
Image Quality of 16-Slice Computed Tomography Angiography Used in Coronary Arteries |
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| HU Bin,CHEN Xiangmin,ZHANG Xuehui,QIAO Binglong,SUN Qiqin.Image Quality of 16-Slice Computed Tomography Angiography Used in Coronary Arteries[J].Beijing Biomedical Engineering,2009,28(4):386-390. |
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| Authors: | HU Bin CHEN Xiangmin ZHANG Xuehui QIAO Binglong SUN Qiqin |
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| Institution: | (Department of Radiology, Qingdao Municipal Hospital, Clinical Hospital Affiliated to Qingdao University, Qingdao, Shandong Province 266011) |
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| Abstract: | Objective To explore quantitative parameters of image quality in consecutive patients undergoing 16-slice computed tomography （MDCT） coronary angiography for elinical reasons. Methods 16- slice CT coronary angiography was performed in 102 patients. Images were reconstructed at 20% - 80% of the cardiac cycle in increments of 10%. Patients were classified three groups according to heart rate（ group Ⅰ： 〈 60bpm, group Ⅱ ：60 -70bpm,group Ⅲ： 〉 70bpm）. We measured the overall visualized vessel length in curved multiplanar reformatted images. Contrast-to-noise ratio （CNR） was measured in the proximal and distal segments of the coronary arteries. Results （1） The mean length of visualized coronary arteries was ： left main 10.9± 3. 0 mm, left anterior descending 130.3± 29.7 mm, left circumflex 82.8±19.8 mm, and right coronary artery 150.5 ±27.5mm. （2） Best image quality occured in coronary segments at 60% , 70% for group Ⅰ and 60% for group Ⅱ. In group Ⅲ, The left main artery, the left anterior descending artery and the left circumflex artery were visualized at 60% R-R phases, while the right coronary artery was seen at 40%. （3） The mean contrast-tonoise ratio in all measured coronary arteries 2. Conclusions 16-slice spiral permits the coronary arteries and good CNR patients. The image quality of 16-slice was 10.9 %. visualization of in consecutive spiral CT was
influenced by heart rate and reconstruction interval. |
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| Keywords: | 16-slice CT Coronary angiography Heart rate interval Reconstruction |
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