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KMID : 1005420150170030180
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Journal of Cerebrovascular and Endovascular Neurosurgery
2015 Volume.17 No. 3 p.180 ~ p.184
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Localization and Treatment of Unruptured Paraclinoid Aneurysms: A Proton Density MRI-based Study
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Yoon Seon-Jin
Shin Na-Young
Lee Jae-Whan
Huh Seung-Kon
Park Keun-Young
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Abstract
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Objective: The purpose of this study was to evaluate the usefulness of proton density magnetic resonance (PD MR) imaging for localization of paraclinoid internal carotid artery aneurysms.
Materials and Methods: From April 2014 to April 2015, 76 unruptured paraclinoid aneurysms in 66 patients were evaluated using PD MR and angiography (CT/MR angiography or digital subtraction angiography). The locations (extradural, transdural, intradural) in relation to the distal dural ring (DDR) and projection (superior, inferior/posterior, medial, lateral) of the aneurysms were assessed and compared.
Results: The most common location of paraclinoid aneurysms was extradural (n = 48, 63.2%), followed by intradural (n = 18, 23.7%), and transdural (n = 10, 13.2%). In the medial projection group (n = 49, 64.5%), 31 were extradural (63.3%), 5 were transdural (10.2%), and 13 were intradural (26.5%). In the inferior/posterior projection group (n = 19, 25.0%), there were 14 extradural (73.7%), 4 transdural (21.0%), and 1 intradural (5.3%). In the superior (n = 4, 5.3%)/lateral (n = 4, 5.3%) projection groups, there were 0/3 extradural (0/75.0%), 1/0 transdural (25.0/0%), and 3/1 intradural (75.0/25.0%).
Conclusion: PD MR showed sufficient contrast difference to distinguish paraclinoid aneurysms from surrounding dural structures.
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KEYWORD
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Aneurysm, Internal carotid artery, Magnetic resonance imaging
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