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Assessment of the Signal Intensity Distribution Pattern within the Unruptured Cerebral Aneurysms Using Color-coded 3D MR Angiography Toru SATOH 1 , Megumi OMI 1 , Chika OHSAKO 1 , Atsushi KATSUMATA 2 , Yusuke YOSHIMOTO 2 , Shoji TSUCHIMOTO 2 , Katsuzo KUNISHIO 3 , Keisuke ONODA 4 , Koji TOKUNAGA 4 , Kenji SUGIU 4 , Isao DATE 4 1Department of Neurological Surgery,Ryofukai Satoh Neurosurgical Hospital 2Department of Neurological Surgery,Onomichi Municipal Hospital 3Department of Neurological Surgery,Kawasaki Medical University Kawasaki Hospital 4Department of Neurological Surgery,Okayama University Graduate School of Medicine,Dentistry and Pharmaceutical Sciences Keyword: MR angiography , intraaneurysmal flow , three-dimensional reconstruction pp.445-454
Published Date 2005/5/1
DOI https://doi.org/10.11477/mf.1436100069

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  • Abstract
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To evaluate the interaction between the MR signal intensity distribution pattern and bleb formation/ deformation of the aneurysmal dome,fifty cases of the unruptured cerebral aneurysms were investigated with the color-coded 3D MR angiography. Patterns were categorized into central-type,neck-type and peripheral-type according to the distribution of MR signals with low-,moderate- and high signal intensity areas. Imaging analysis revealed the significant relationship (P<0.02) of the peripheral-type aneurysms to the bleb formation and deformation of the dome,compared with those of central- and neck-type. Additionally,peripheral-type signal intensity distribution pattern was shown with aneurysms harboring relatively large dome size and lateral-type growth including internal carotid aneurysms. Prospective analysis of intraaneurysmal flow pattern with the color-coded 3D MR angiography may provide patient-specific analysis of intraaneurysmal flow status in relation to the morphological change of the corresponding aneurysmal dome in the management of unruptured cerebral aneurysms.


Copyright © 2005, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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