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Intraindividual Comparison of Image Artifacts of Two Generations of Rotatable Cochlear Implant Magnets.
Kim, Rayoung; Schleyer, Simon; Björn Gehl, Hans; Sudhoff, Holger; Goon, Peter; Todt, Ingo.
Afiliación
  • Kim R; Department of Otolaryngology, Head and Neck Surgery, Medical School OWL, Bielefeld University, Klinikum Bielefeld, Bielefeld, Germany.
  • Schleyer S; Department of Otolaryngology, Head and Neck Surgery, Medical School OWL, Bielefeld University, Klinikum Bielefeld, Bielefeld, Germany.
  • Björn Gehl H; Department of Radiology, Medical School OWL, Bielefeld University, Campus Mitte, Klinikum Bielefeld, Nordrhein-Westfalen, Bielefeld, Germany.
  • Sudhoff H; Department of Otolaryngology, Head and Neck Surgery, Medical School OWL, Bielefeld University, Klinikum Bielefeld, Bielefeld, Germany.
  • Goon P; Department of Medicine, National University of Singapore, and National University Health System, Singapore.
  • Todt I; Department of Otolaryngology, Head and Neck Surgery, Medical School OWL, Bielefeld University, Klinikum Bielefeld, Bielefeld, Germany.
J Int Adv Otol ; 20(4): 306-311, 2024 Jul 29.
Article en En | MEDLINE | ID: mdl-39161162
ABSTRACT
In cochlear implant recipients, the diagnostic value of magnetic resonance imaging (MRI) scans is reduced by image artifacts. The static magnetic field of a 3.0T scanner is associated with the risk of implant demagnetization. The development of rotatable implant magnets aimed to support the advancement of 3.0T MRI scanners and eliminate the risk of demagnetization of cochlear implant magnets. This study aimed to compare the image artifacts caused by first-t and second-generation rotatable cochlear implant magnets in 3.0T MRI. Three Tesla MRI T2W TSE sequences were performed on 3 subjects with first- and second-generation rotatable cochlear implant magnets. The cochlear implant was fixed to the head at the implantation position by a swim cap. The size of the image artifact was determined in the transverse plane. Intraindividual comparative analyses showed that within the margin of combined uncertainty of 5 mm at a resolution of 2 mm, the cochlear implant-induced image artifacts in all subjects showed for both (first- and second-generation rotatable cochlear implant magnets), the same maximum image artifact dimension of 125 mm. We could show that no difference in image artifact size was detected within the margin of error determined by resolution, localized induced shift of the scan, and reproducibility of the tilt angle of the head relative to the chest in a living subject. Assumed improved magnet attachment can be reached without compromising of the magnet artifact size.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen por Resonancia Magnética / Implantes Cocleares / Artefactos / Imanes Límite: Female / Humans / Male Idioma: En Revista: J Int Adv Otol Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Turquía
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen por Resonancia Magnética / Implantes Cocleares / Artefactos / Imanes Límite: Female / Humans / Male Idioma: En Revista: J Int Adv Otol Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Turquía