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首页> 外文期刊>Vascular and endovascular surgery >Nonenhanced MRI Planning for Endovascular Repair of Abdominal Aortic Aneurysms: Comparison With Contrast-Enhanced CT Angiography
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Nonenhanced MRI Planning for Endovascular Repair of Abdominal Aortic Aneurysms: Comparison With Contrast-Enhanced CT Angiography

机译：腹主动脉瘤血管内修复的非肤色MRI规划：与对比增强CT血管造影的比较

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Background: To assess whether noncontrast-enhanced magnetic resonance imaging (NC-MRI) is an alternative to contrast-enhanced computed tomography angiography (CTA) for aortoiliac measurements before endovascular abdominal aortic aneurysm repair (EVAR). Methods: This study encompasses 30 patients admitted for elective EVAR (27 men and 3 women). Two expert readers (vascular radiologist and vascular surgeon) reviewed CTA images in consensus and chose the proper endograft for each patient. Subsequently, a vascular radiologist and a resident radiologist (observer 1 and 2) reviewed CTA and NC-MRI examinations in a double-blind way and completed standard measurements. The interobserver and intermodality agreement was calculated by intraclass correlation coefficients (ICCs). Furthermore, the correlation between the endograft size chosen by the first pair and the second pair of observers was evaluated. Results: Concerning all measurements, no significant difference was found. Both CTA and NC-MRI angiographic measurements showed strong correlation. Interobserver ICCs for CTA and NC-MRI showed ranges of 0.62 to 0.99 (mean: 0.92) and 0.56 to 0.99 (mean: 0.91); intermodality ICCs for observer 1 and 2 showed ranges of 0.64 to 0.99 (mean: 0.92) and 0.56 to 0.99 (mean: 0.92). The CTA and NC-MRI vascular measurements correlated strongly, except for both external iliac artery diameters. The choice of stent size was always the same between the 2 observers; furthermore, graft size was always in agreement with that selected prospectively. Conclusion: Computed tomography angiography remains the standard of reference for EVAR planning; NC-MRI can be an option for patients with contraindications for CTA, in particular those with renal impairment.
机译：背景：评估非共同抑制的磁共振成像（NC-MRI）是对血管内腹膜主动脉瘤修复（EVAR）之前对比增强的计算断层血管造影（CTA）的替代方案。方法：本研究包括供应选修Evar（27名男性和3名女性）的30名患者。两位专家读者（血管放射科医生和血管外科医生）在共识中审查了CTA图像，并为每位患者选择了适当的内血资移植物。随后，血管放射科医生和驻留放射科（Observer 1和2）以双盲方式审查了CTA和NC-MRI检查，并完成了标准测量。 interobserver和帧间性协议是通过跨周性相关系数（ICC）计算的。此外，评价由第一对和第二对观察者选择的内血填充尺寸之间的相关性。结果：关于所有测量，未发现显着差异。 CTA和NC-MRI血管造影测量均显示出强烈的相关性。 CTA和NC-MRI的Interobserver ICC显示0.62至0.99（平均：0.92）和0.56至0.99（平均：0.91）; Observer 1和2的互相ICCs显示0.64至0.99（平均值：0.92）和0.56至0.99（平均值：0.92）。 CTA和NC-MRI血管测量强烈相关，除了外部髂动脉直径除外。 2观察者之间的支架尺寸的选择总是相同的;此外，移植尺寸始终与前瞻性选择的达成协议。结论：计算机断层造影血管造影仍然是EVAR规划的参考标准; NC-MRI可以是CTA禁忌症患者的选择，特别是那些具有肾脏损伤的患者。

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