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首页> 外文期刊>Acta Radiologica >Evaluation of contrast-enhanced MR angiography in the follow-up of visceral arterial aneurysms after coil embolization
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Evaluation of contrast-enhanced MR angiography in the follow-up of visceral arterial aneurysms after coil embolization

机译：线圈栓塞后内脏动脉瘤随访中对比增强MR血管造影的评价

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Background: The placement of detachable coil has become the alternative method of treating visceral arterial aneurysms (VAAs). Imaging follow-up is necessary after coil embolization because of frequent incomplete occlusion. Purpose: To compare contrast-enhanced magnetic resonance angiography (CE-MRA) at 3T with a reference standard of digital subtraction angiography (DSA) for the evaluation of VAAs after coil embolization. Material and Methods: We treated 15 patients with VAA with coil embolization; eight had splenic artery aneurysms and seven had renal artery aneurysms. We packed the aneurysmal sac preserving native arterial circulation. For follow-up, all patients underwent CE-MRA at 3T and DSA. The results were classified according to coil occlusion: Class 1, complete occlusion; Class 2, residual neck; Class 3, aneurysmal filling. Results: CE-MRA revealed 11 complete occlusions and four residual necks. DSA follow-up showed 12 complete occlusions and three residual necks. No aneurysmal filling occurred after treatment. Comparison of CE-MRA and DSA findings showed 93% agreement (14/15). CE-MRA allowed the detection of a residual neck in one misclassified case in which DSA showed occlusion. Coil-related artifacts were minimal and did not interfere with evaluation of the occlusion status of the VAAs. Conclusion: CE-MRA at 3T provides high-quality images equivalent to DSA for the evaluation of VAAs after coil embolization. We suggest that CE-MRA at 3T might be used as the primary method for follow-up of VAAs after coil embolization.
机译：背景：可分离线圈的放置已成为治疗内脏动脉瘤（VAA）的替代方法。由于频繁的不完全闭塞，在线圈栓塞后必须进行影像学随访。目的：将3T造影剂增强型磁共振血管造影（CE-MRA）与数字减影血管造影（DSA）的参考标准进行比较，以评估线圈栓塞后的VAA。材料与方法：我们采用线圈栓塞治疗了15例VAA。八例有脾动脉瘤，七例有肾动脉瘤。我们包装了动脉瘤囊，以保持天然动脉循环。为了进行随访，所有患者均在3T和DSA接受了CE-MRA。根据线圈闭塞将结果分类：1级，完全闭塞;第2类，残留颈部; 3级，动脉瘤充盈。结果：CE-MRA显示11个完全闭塞和4个残留的颈部。 DSA随访显示12个完全闭塞和3个残余颈部。治疗后无动脉瘤充盈。 CE-MRA和DSA结果的比较显示出93％的一致性（14/15）。 CE-MRA可以在DSA显示闭塞的一种误分类病例中检测到残留的颈部。线圈相关的伪影极少，并且不会干扰VAA的闭塞状态评估。结论：3T时的CE-MRA可提供等效于DSA的高质量图像，用于评估线圈栓塞后的VAA。我们建议将3T的CE-MRA用作线圈栓塞后随访VAA的主要方法。

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