【摘 要】
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Background and purpose-To investigate feasibility and usefulness of contrast enhanced MR angiography (CEMRA) imaging protocol to follow up patients with intracranial aneurysms treated with endovascula
【机 构】
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Department of Diagnostic Imaging Dalhousie University Canada
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Background and purpose-To investigate feasibility and usefulness of contrast enhanced MR angiography (CEMRA) imaging protocol to follow up patients with intracranial aneurysms treated with endovascular coiling.Methods-From September 2003 to December 2006, 134 aneurysms were treated by endovascular coiling in 124 patients using detachable coils.These patients were followed up using CEMRA at 3 months, 15 months and at 3 years.MRA images were analyzed by 2 Interventional neuroradiologists.Findings were assigned to 3 categories: complete obliteration (class 1), residual neck (class 2) and residual aneurysm (class 3).Results-Initially, CEMRA demonstrated 67(50 %) complete obliteration (class 1), 56 (41.79 %) residual neck (class 2) and 8 (5.97 %) residual aneurysms (class 3).No patient experienced re-bleed during the follow-up period.A total of 214 patient-years follow-up was obtained (range 0-53 months).2 (1.49%) patients died after the follow up and 11(8.21%) patients were lost to follow-up.On follow up, 76 (56.72%) of patients showed stable results.56 (41.79%) of aneurysms showed change in their obliteration pattern.Out of these 56, 47 demonstrated recanalization and 9(6.72%) showed further obliteration.Most of the aneurysms which showed change in their obliteration remained stable on follow-up.Only 11 (8.21% of the total and 23.4% of those which show recanalization) patients underwent re-coiling or clipping.Conclusion-CEMRA can be used in routine practice to non-invasively follow-up aneurysm recanalization.CEMRA permits close interval follow-up and may show more filling of the aneurysm neck or sac than DSA.
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