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Efficacy of MR angiographic original images on surgery for posterior communicating artery aneurysms Yasuhiro TAKEICHI 1 , Masayuki KOJIMA 1 , Hidehiko LEE 1 , Noboru FUNATSU 1 , Kazumitsu KYOUSHIMA 1 , Nobuhisa MABUCHI 2 , Eimei TSUDA 1 , Shiro NAGASAWA 3 1Department of Neurosurgery, Soseikai General Hospital 2Department of Radiology, Soseikai General Hospital 3Department of Neurosurgery, Osaka Medical College Keyword: cerebral aneurysm , MRI , original images , posterior communicating artery , SPGR pp.411-416
Published Date 1997/5/10
DOI https://doi.org/10.11477/mf.1436901385
  • Abstract
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This study evaluated the usefulness of axial source images of magnetic resonance angiography (MRA) on preoperative depiction of surgical topography around posterior communicating artery aneurysms. Twenty pa-tients with posterior communicating artery aneurysms,two ruptured and eighteen unruptured, underwent con-ventional angiography as well as axial source and pro-jection images obtained by three-dimensional time-of-flight MRA techniques.By comparing the topography based on these angiograms to that confirmed during surgery,we evaluated useful information specific to the source images of MRA.

Source images of MRA visualized the posterior com- municating artery and the anterior choroidal artery in eighteen cases (90%) and five cases (25%),respectively.The posterior communicating artery was recognized at a higher rate by source images of MRA than by con-ventional angiography(65%), while the anterior choroi-dal artery was recognized at a lower rate than by com-bined angiography (75%).We realized some specific in-formation to the source images of MRA including the topographical relations between the aneurysmal neckand the orifice of the posterior communicating artery,the relations between the aneurysmal dome and the oculomotor nerve and the aneurysmal dome buried into the temporal lobe. The information suggested a satis-factory direction of safe aneurysmal clipping so as notto occlude the posterior commucating artery. It was concluded that the source images of MRA provided additional useful information on surgical topography in 60% of the cases involving posterior communicating artery aneurysms. Although not essen-tial in every case, the information would be beneficial in cases with the aneurysmal dome suspected to be in the temporal lobe or when the surrounding topography can not be clearly understood by angiography.


Copyright © 1997, 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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