MRA与CTA在诊断腹部内脏动脉瘤中的应用

Application of MRA and CTA in the Diagnosis of Abdominal Visceralartery Aneurysms

目的研究磁共振血管成像(MRA与CT血管成像(CTA)在诊断腹部内脏动脉瘤(VAAs)中的应用价值。方法选取2013年6月至2018年6月我院同时行MRA和CTA检查的104例疑似VAAs患者临床资料进行回顾性分析,比较两种检查方法对不同大小病灶以及瘤壁钙化、瘤内血栓、瘤体带蒂等病理特征检出率,并以CTA检查结果为"金标准",分析MRA诊断价值。结果 104例患者中确诊VAAs患者79例(75.96%),共检出VAAs病灶95枚,其中MRA确诊73例(87枚),灵敏度为92.41%,特异度为92.00%,准确率为92.31%,与CTA相比Kappa值为0.800,具有良好一致性,且MRA与CTA对不同类型VAAs诊断结果差异无统计学意义(P>0.05);MRA测量VAAs病灶平均直径大于CTA,对瘤壁钙化检出率低于CTA,差异有统计学意义(P<0.05);结论 MRA对微小病灶和瘤壁钙化显示效果较为欠缺,但诊断准确率与CTA检查一致性良好,因此两种检查均可作为内脏动脉瘤有效检查方法。

Objective To study the application value of magnetic resonance angiography(MRA) and CT angiography(CTA) in the diagnosis of abdominal visceral arteryaneurysms(VAAs). Methods The clinical data of 104 patients suspected as VAAs who underwent MRA and CTA in our hospital from June 2013 to June 2018 were retrospectively analyzed. Thedetection rates of pathological features of different sizes of lesions, tumor wall calcification, intratumoral thrombosis and tumor pedicle were compared between the two methods. The results of CTA test were taken as gold standards, and the diagnostic value of MRA was analyzed. Results Among 104 cases of patients, 79 cases(75.96%) were diagnosed with VAAs, and a total of 95 VAAs lesions were detected, and 73 cases(87 lesions) were diagnosed by MRA, and the sensitivity, specificityand accuracy rate were92.41%, 92.00% and 92.31%. Compared with CTA, its Kappa value was 0.800 and it has good consistency, and there were no significant differences between MRA and CTA in the diagnosis of different types of VAAs(P>0.05). The average diameter of VAAs lesions by MRA was larger than that of CTA, and the detection rate of tumor wallcalcification was lower than that of CTA(P<0.05). Conclusion MRA is less effective in displaying small lesionsand tumor wallcalcification, but its diagnostic accuracy is in good consistency with CTA. Therefore, the two methods can be used as effective methods for visceral artery aneurysms.