摘要
目的探讨多层螺旋CT冠状动脉成像评价冠状动脉支架通畅性的临床效果。方法对26例冠状动脉支架植入术后患者的40枚支架行多层螺旋CT性心电门控增强扫描,所有患者均在CTA之后3个月内再次行CAG检查。评价支架的轴位,多平面重组(MPR)图像及通过支架内腔中心的曲面重组(CPR)图像,计算支架内管腔面积与支架标定的管腔面积的比值以评价支架内腔狭窄程度。CTA结果与CAG判定的结果相比较。结果全部40枚支架腔内狭窄程度的评估,支架腔>50%狭窄的敏感性和特异性分别为71.4%和100%,诊断支架腔<50%狭窄的敏感性和特异性分别为77.8%和93.9%,诊断支架腔内无狭窄的敏感性和特异性分别为87.5%和100%。在一定条件下,16层与64层螺旋CT诊断冠状动脉支架管腔狭窄程度的结果间差异没有显著性(P>0.05)。结论以传统冠状动脉造影(CAG)为金标准,MSCT判断冠状动脉支架再狭窄病变中对于阴性病例及>50%的严重病例具有较高的特异性。
Objective To investigate the clinical value of multislice CT coronary angiography （CTA） in assessment of coronary stent patency. Methods Twenty-six patients with 40 stents were investigated using a retrospective ECG gated enhanced scan by MSCT. CTA findings were correlated to CAG results that were performed within 3 months after the CTA examination. The degree of stenosis was divided into three groups： 0, 0-50%, 50%-100%. CTA images were evaluated through the axial image, MPR and CPR, and the area or diameter of the lumen of stent was accessed. Results For the ones that degree of stenosis were ≥50%, the sensitivity and specificity are 71.4% and 100%, respectively. For those 0-50%, the sensitivity and specificity were 77.8% and 93.9%. For those none stenosis, the sensitivity and specificity were 87.5% and 100%. There was no significant difference between the results taken by 16-slice spiral CT and by 64-slice spiral CT （P 〉0.05）. Conclusion Taken CAG as the gold standard, there is relatively high specificity in accessing negative cases and degree of restenosis ≥50% cases when we evaluate the degree of restenosis of coronary stents.
出处
《中国医学影像技术》
CSCD
北大核心
2006年第10期1492-1495,共4页
Chinese Journal of Medical Imaging Technology
