ID | 48559 |
JaLCDOI | |
フルテキストURL | |
著者 |
Ohno, Seiichiro
Department of Radiology, Okayama University Hospital
Harimoto, Takashi
Graduate School of Health Sciences, Okayama University
Hirosue, Miyuki
Murakami Neurosurgery Clinic
Miyai, Masahiro
Department of Radiology, Shimane University Hospital
Hattori, Kengo
Graduate School of Health Sciences, Okayama University
Kuroda, Masahiro
Graduate School of Health Sciences, Okayama University
ORCID
Kaken ID
publons
researchmap
Kanazawa, Susumu
Department of Radiology, Okayama University Graduate School of Medicine,
Kaken ID
publons
Inamura, Keiji
Department of Radiology, Okayama University Hospital
Kato, Hirokazu
Graduate School of Health Sciences, Okayama University
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抄録 | Magnetic resonance imaging (MRI) visualization of metallic stent lumens is possible if the stent structure
counteracts eddy currents in the lumen induced by the radio frequency magnetic field, B1. To examine the effectiveness of various stent designs in counteracting eddy currents, we anchored eight copper stent models and 2 commercially available nickel-titanium alloy (Nitinol) stents in a gel phantom,
perpendicular or parallel to the direction of B1. A mesh stent lumen showed hypointensity irrespective
of its alignment relative to B1. A solenoid stent lumen showed hypointensity with the stent axis parallel to B1, but it had the same signal intensity as outside the lumen when perpendicular to B1. A Moebius stent lumen showed no signal reduction, irrespective of alignment relative to B1. Lumens of the commercially available stents showed hypointensity regardless of alignment relative to B1. Computer simulation revealed that the signal intensities of the stents corresponded to magnetic flux densities of B1 in the stents, which are modified by the structure of the stent. While in vivo MRI viewing
of a Moebius stent lumen is likely possible regardless of axis alignment, inherent structural weakness
may be problematic. As a more practical choice, the solenoid stent is easier to manufacture and generates no hypointensive signal when the axis is parallel to B0.
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キーワード | MRI
visualization of stent lumen
solenoid pattern
Moebius pattern
direction of B1
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Amo Type | Original Article
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出版物タイトル |
Acta Medica Okayama
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発行日 | 2012-06
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巻 | 66巻
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号 | 3号
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出版者 | Okayama University Medical School
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開始ページ | 203
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終了ページ | 211
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ISSN | 0386-300X
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NCID | AA00508441
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資料タイプ |
学術雑誌論文
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言語 |
英語
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著作権者 | CopyrightⒸ 2012 by Okayama University Medical School
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論文のバージョン | publisher
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査読 |
有り
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PubMed ID | |
Web of Science KeyUT | |
関連URL | http://ousar.lib.okayama-u.ac.jp/metadata/48542
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