检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:孙凯[1] 韩瑞娟[2] 马利军[1] 王利军[1] 王志清[1] 郭城[1] 赵冬梅[1] 王刚[1]
机构地区:[1]内蒙古自治区包头市中心医院影像中心,014040 [2]内蒙古自治区包头市中心医院心内科,014040
出 处:《中华放射学杂志》2012年第1期49-53,共5页Chinese Journal of Radiology
基 金:基金项目:内蒙古科学技术基金项目(20110054)
摘 要:目的评价第2代双源cT大螺距前瞻性心电门控扫描模式(Flashspiral)评价冠状动脉狭窄的准确性、图像质量及有效辐射剂量。方法接受第2代双源CT冠状动脉成像(CTCA)检查的1077例患者中,入选采用Flashspiral模式扫描并于30d内行冠状动脉造影(CCA)患者共73例,以CCA结果作为金标准,统计CTCA显示冠状动脉病变的敏感度、特异度、阳性预测值和阴性预测值;一致性采用Kappa值进行U检验;评价冠状动脉各段图像质量及有效辐射剂量。结果73例患者共显示冠状动脉925节段。(1)准确性评价:基于节段水平分析,敏感度为93.2%(164/176),特异性96.4%(722/749),阳性预测值为85.9%(164/191),阴性预测值为98.4%(722/734)。基于血管分析,敏感度为98.4%(123/125),特异度为87.4%(83/95),阳性预测值为91.1%(123/135),阴性预测值为97.6%(83/85)。基于患者分析,敏感度为100%(44/44),特异度为89.7%(26/29),阳性预测值为93.6%(44/47),阴性预测值为100%(26/26)。CTCA显示冠状动脉狭窄分级与CCA高度一致。(2)图像质量:1例患者体质量指数较大,回旋支远段显影差,远端血管不可评估;2例患者由于心率变异性较大,右冠状动脉近中段有运动伪影,其余患者图像质量均较好。(3)辐射剂量:平均有效辐射剂量为(1.14±0.10)mSv。结论大螺距双源CTFlashspiral模式CTCA评价冠状动脉狭窄的准确性高,图像质量好,运动伪影小,有效辐射剂量低。Objectives To prospectively investigate the diagnostic accuracy, image quality and radiation doses of prospectively ECG-triggered high-pitch spiral acquisition computed tomography coronary angiography (CTCA) using Flash dual-source CT for the diagnosis of significant coronary stenoses. Methods Seventy-three patients underwent both CTCA and CCA. CTCA was performed using a Flash dual-source CT system with data acquisition at a high-pitch of 3.4. CCA served as the standard of reference. Radiation dose values were calculated using the dose-length product. Results There were 925 vessel segments in 73 patients. (1)Diagnostic accuracy: the sensitivity, specificity and positive and negative predictive values were 93.2% (164/176) ,96. 4% (722/749) ,85.9% ( 164/191 ) ,98.4% (722/734) for segment assessment and 98.4% ( 123/125), 87. 4% ( 83/95 ), 91.1% ( 123/135 ), 97. 6% ( 83/85 ) for vessel assessment and 100% (44/44), 89.7% ( 26/29 ), 93.6% ( 44/47 ), 100% ( 26/26 ) for patient assessment. ( 2 ) Image quality : there were 2 coronary segments of right coronary artery and one segment of left circumflex artery with non-diagnostic image quality. There was no non-diagnostic image quality in left anterior descending artery. (3) Radiation dose: the effective radiation dose was ( 1.14±0. 10) mSv. Conclusions CTCA using the prospectively ECG-triggered high-pitch spiral mode of the Flash dual-source CT system is associated with high diagnostic accuracy for the assessment of coronary artery stenoses at low dose.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:18.224.169.195