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Comparative analysis between 64- and 320-slice spiral computed tomography in the display of coronary artery stents and diagnosis of in-stent restenosis

机译:冠状动脉支架内显示64层和320层螺旋计算机断层扫描技术的比较分析及支架内再狭窄的诊断

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摘要

The aim of the present study was to compare the accuracy of 64-multi-slice spiral computed tomography (64-MSCT) and 320-MSCT in the display of coronary artery stents and diagnosis of in-stent restenosis. The data collected from the 64- and 320-MSCT coronary angiography of 93 patients following coronary artery stent implantation were retrospectively analyzed. The 64-MSCT group comprised 30 cases with 57 stents and the 320-MSCT group comprised 63 cases with 93 stents. The image quality, heart rate of the patients and the radiation effective dose (ED) they were subjected to, were compared. Furthermore, the diagnostic abilities of 64-and 320-MSCT coronary angiography for in-stent restenosis were evaluated using invasive coronary angiography results as the gold standards. Statistically significant differences were observed in the heart rate and ED of the patients from the two groups (P<0.05), but no significant difference was identified in the accuracy index (P>0.05). The sensitivity, specificity, positive and negative predictive value and accuracy of the 64-MSCT group were found to be 100% (7/7), 93.94% (31/33), 77.78% (7/9), 100% (31/31) and 95% (38/40), respectively, and those in the 320-MSCT group were found to be 100% (16/16), 95.89% (70/73), 84.21% (16/19), 100% (70/70) and 96.63% (86/89), respectively. The present findings suggest that both 64-MSCT and 320-MSCT can be used for follow-up and curative effect evaluation following coronary stent implantation; however, 320-MSCT has fewer requirements of the patients' heart rate and uses a lower radiation dose.
机译:本研究的目的是比较64层螺旋计算机体层摄影术(64-MSCT)和320-MSCT在冠状动脉支架显示和支架内再狭窄诊断中的准确性。回顾性分析了从93例冠状动脉支架植入术后患者的64和320-MSCT冠状动脉造影中收集的数据。 64-MSCT组包括30例,有57个支架,而320-MSCT组包括63例,有93个支架。比较了患者的图像质量,心率和所接受的辐射有效剂量(ED)。此外,使用侵入性冠状动脉造影结果作为金标准,评估了64和320-MSCT冠状动脉造影对支架内再狭窄的诊断能力。两组患者的心律和ED差异有统计学意义(P <0.05),但准确性指数差异无统计学意义(P> 0.05)。 64-MSCT组的敏感性,特异性,阳性和阴性预测值和准确性分别为100%(7/7),93.94%(31/33),77.78%(7/9),100%(31 / 31)和95%(38/40),以及320-MSCT组中的分别为100%(16/16),95.89%(70/73),84.21%(16/19), 100%(70/70)和96.63%(86/89)。本研究结果表明64-MSCT和320-MSCT均可用于冠状动脉支架植入术后的随访和疗效评估。然而,320-MSCT对患者心率的要求较低,并且使用的辐射剂量较低。

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