| Artifacts caused by cochlear implants with non-removable magnets in 3T MRI: phantom and cadaveric studies. | |
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MedLine Citation:
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PMID: 19629509 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this study was to evaluate artifacts produced by cochlear implants (CI) during 3.0 Tesla (T) magnetic resonance imaging of the brain using different sequences on phantom and cadaveric specimens. A phantom and three cadaveric specimens with CIs were imaged using a 3.0 T clinical scanner. Artifacts were analyzed quantitatively and according to the sequence used. Different brain regions were evaluated for image distortion and limitation of diagnostic significance. In cadaver studies, all sequences generated signal-void areas around the implant. In T2-weighted sequences, additional periodic shadowing was discovered. Anatomical structures of the brain on the contralateral side of the CI were for the most part undistorted. At 3T, artifacts around CIs with non-removable magnets compromise image quality of the nearby brain regions and diagnosis of brain lesions is limited. In the contralateral hemisphere, diagnostic accuracy is only marginally limited. |
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Authors:
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Omid Majdani; Thomas S Rau; Friedrich G??tz; Martin Zimmerling; Minoo Lenarz; Thomas Lenarz; Robert Labadie; Martin Leinung |
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Publication Detail:
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Type: Comparative Study; Journal Article Date: 2009-07-23 |
Journal Detail:
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Title: European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery Volume: 266 ISSN: 1434-4726 ISO Abbreviation: Eur Arch Otorhinolaryngol Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-10-26 Completed Date: 2010-01-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9002937 Medline TA: Eur Arch Otorhinolaryngol Country: Germany |
Other Details:
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Languages: eng Pagination: 1885-90 Citation Subset: IM |
Affiliation:
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Department of Otolaryngology, Head and Neck Surgery, Medical University of Hannover, Carl-Neuberg-Str. 1, OE 6500, 30625 Hannover, Germany. Omid.Majdani@Vanderbilt.edu |
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| MeSH Terms | |
Descriptor/Qualifier:
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Artifacts* Cadaver Cochlear Implants* Humans Imaging, Three-Dimensional* Magnetic Resonance Imaging / methods* Magnetics / instrumentation* Phantoms, Imaging* Prosthesis Design Reproducibility of Results |
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