title: [Postoperative imaging of the internal auditory canal : Visualization of active auditory implants. German version].
abstract: BACKGROUND
  Assessment of the internal auditory canal (IAC) and the cochlea is of central importance in neurotology. The artefacts and visibility of the different types of active auditory implants in MRI vary, due to their specific ferromagnetic components. Knowledge of the size of MRI artefacts and the options for handling these is important for the auditory rehabilitation of specific diseases (e. g., vestibular schwannoma).
  
  
  METHODS
  The current paper is a literature review RESULTS: MRI assessment of the IAC and cochlea after surgical placement of an active auditory implant is feasible only with a percutaneous bone-anchored hearing aid (BAHA, Ponto). When specific factors (implant position and MRI sequence) are taken into consideration, these structures can be visualized even after cochlear implantation. Complications such as magnet dislocation and pain may occur.
  
  
  CONCLUSIONS
  The possibility of assessing the IAC and cochlea by MRI is an important aspect that needs to be taken into consideration when planning the auditory rehabilitation of patients after acoustic neuroma surgery.
authors.affiliation: Klinik für Hals-, Nasen- und Ohrenheilkunde, Unfallkrankenhaus Berlin, Warener Str. 7, 12683, Berlin, Deutschland. ingo.todt@ukb.de.
authors.forename: I
authors.initials: I
authors.lastname: Todt
authors.affiliation: Klinik für Radiologie und Neuroradiologie, Unfallkrankenhause Berlin, Berlin, Deutschland.
authors.forename: G
authors.initials: G
authors.lastname: Rademacher
authors.affiliation: Klinik für Hals-, Nasen- und Ohrenheilkunde, Unfallkrankenhaus Berlin, Warener Str. 7, 12683, Berlin, Deutschland.
authors.forename: P
authors.initials: P
authors.lastname: Mittmann
authors.affiliation: Klinik für Radiologie und Neuroradiologie, Unfallkrankenhause Berlin, Berlin, Deutschland.
authors.forename: S
authors.initials: S
authors.lastname: Mutze
authors.affiliation: Klinik für Hals-, Nasen- und Ohrenheilkunde, Unfallkrankenhaus Berlin, Warener Str. 7, 12683, Berlin, Deutschland.
authors.forename: A
authors.initials: A
authors.lastname: Ernst
mesh_terms: D003051:Cochlea / Q000000981:diagnostic imaging; D019929:Cochlear Implantation; D003054:Cochlear Implants; D007758:Ear, Inner; D006801:Humans; D008279:Magnetic Resonance Imaging; D009464:Neuroma, Acoustic / Q000000981:diagnostic imaging
keywords: Cochlea; Cochlear implant; Implantable neurostimulators; Inner ear; Magnetic resonance imaging