Document Detail

Artifacts caused by cochlear implants with non-removable magnets in 3T MRI: phantom and cadaveric studies.
MedLine Citation:
PMID:  19629509     Owner:  NLM     Status:  MEDLINE    
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.
Omid Majdani; Thomas S Rau; Friedrich G??tz; Martin Zimmerling; Minoo Lenarz; Thomas Lenarz; Robert Labadie; Martin Leinung
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2009-07-23
Journal Detail:
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:
Created Date:  2009-10-26     Completed Date:  2010-01-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9002937     Medline TA:  Eur Arch Otorhinolaryngol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1885-90     Citation Subset:  IM    
Department of Otolaryngology, Head and Neck Surgery, Medical University of Hannover, Carl-Neuberg-Str. 1, OE 6500, 30625 Hannover, Germany.
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MeSH Terms
Cochlear Implants*
Imaging, Three-Dimensional*
Magnetic Resonance Imaging / methods*
Magnetics / instrumentation*
Phantoms, Imaging*
Prosthesis Design
Reproducibility of Results

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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