64层多排螺旋冠脉CTA与增强MRI延迟扫描对心肌梗死范围的比较

王新江; 蔡祖龙; 赵红; 程流泉; 贾楠; 李征芳; 杨立; 苏平; 刘建军

中国临床医学影像杂志 ›› 2009, Vol. 20 ›› Issue (5) : 338-341.

论著

64层多排螺旋冠脉CTA与增强MRI延迟扫描对心肌梗死范围的比较

王新江1，蔡祖龙1，赵红1，程流泉1，贾楠1，李征芳1，杨立1，苏平2，刘建军2

作者信息 +

Comparative study of coronary CTA using 64 MSCT and delayed-enhanced MRI in evaluating the volume of myocardial infarction

WANG Xin-jiang1, CAI Zu-long1, ZHAO Hong1, CHENG Liu-quan1,
JIA Nan1, LI Zheng-fang1, YANG Li1, SU Ping2, LIU Jian-jun2

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文章历史 +

摘要

目的：比较64层MSCT冠状动脉CTA检查时心肌低密度与增强MRI延迟强化对心肌梗死体积显示的差异。材料和方法：回顾性测量同时行64层MSCT和DE-MRI检查的心肌梗死患者23例。64层MSCT冠状动脉CTA图像进行左室短轴位图像重建，层厚8mm，层间隔8mm。测量每层短轴位图像上心肌低密度面积，将各层低密度面积累计积分得到体积。上述患者行DE-MRI延迟扫描，左室短轴位层厚为8mm，层间隔8mm，将各层中延迟强化心肌面积进行累计积分，得到MRI延迟强化测量的心肌梗死体积。将上述两种方法测量的体积进行配对t检验，以DE-MRI延迟强化得到的体积做为参考标准，比较MSCT通过心肌低密度判断心肌梗死的准确性。结果：64层MSCT冠状动脉CTA图像低密度与DE-MRI延迟强化测量得到的体积分别为（7.66±5.95）ml和（15.33±9.71）ml，P<0.01，二者相关系数为0.727。结论：通过64层MSCT冠状动脉CTA显示心肌低密度判断心肌梗死与DE-MRI有一定相关性，但会低估梗死的范围。

Abstract

Objective: To assess myocardial hypo-enhancement in demonstrating the myocardial infarction(MI) in coronary artery CT angiography(CTA) performed by 64-MSCT and to compare the results with delayed-enhanced MRI(DE-MRI). Materials and Methods: Twenty-three patients suspected of MI underwent both 64-MSCT and DE-MRI scanning. On 64-MSCT scanning, 60~85ml iodine contrast medium(370mgI/ml) were injected and flushed with 40ml saline, injection velocity is 4~5ml/s. The short axis of the left ventricle was reconstructed with 8mm slice thickness. On MRI scanning, contiguous left ventricular short-axis views were obtained 10 to 15min after the administration of gadopentetate dimeglumine 0.2mmol/kg. The hypo-enhanced volume from CTA and delay-enhanced volume from DE-MRI were measured and compared. Results: The MI volume measured by 64-MSCT and DE-MRI were (7.66±5.95)ml and (15.33±9.71)ml, respectively. The hypo-enhanced volume measured by 64-MSCT was correlated with that measured by DE-MRI(r=0.727). Conclusions: The MI demonstrated as hypo-enhanced region on CTA was underestimated compared to hyper-enhanced volume by DE-MRI.

导出引用

王新江;蔡祖龙;赵红;程流泉;贾楠;李征芳;杨立;苏平;刘建军. 64层多排螺旋冠脉CTA与增强MRI延迟扫描对心肌梗死范围的比较[J]. 中国临床医学影像杂志. 2009, 20(5): 338-341

WANG Xin-jiang;CAI Zu-long;ZHAO Hong;CHENG Liu-quan;JIA Nan;LI Zheng-fang;YANG Li;SU Ping;LIU Jian-jun. Comparative study of coronary CTA using 64 MSCT and delayed-enhanced MRI in evaluating the volume of myocardial infarction[J]. Journal of China Clinic Medical Imaging. 2009, 20(5): 338-341

中图分类号： Ｒ542.22 Ｒ814.42 R445.2