title: Intracochlear assessment of electrode position after cochlear implant surgery by means of multislice computer tomography.
abstract: The development of electrode arrays, the past years, has focused on modiolus-hugging cochlear implant electrodes. Besides, atraumatic implantation of electrodes is of importance for the use in hearing preservation, in cases of combined electric and acoustic stimulation. Intracochlear positioning of the individual electrodes by means of multislice computer tomography (CT) has not yet been shown. In this study we formulated and tested a CT imaging protocol for postoperative scanning of the temporal bone in cochlear implant subjects. Both a fresh human temporal bone and a fresh human cadaver head were implanted with a cochlear implant. Multislice CT was performed for adequate depiction of the cochlear implant. All scans were analyzed on a viewing workstation. After mid-modiolar reconstruction we were able to identify the intracochlear electrode position relative to the scala tympani and scala vestibuli. This was possible in both the implanted isolated temporal bone and the fresh human cadaver head. The feasibility of imaging the electrode position of the cochlear implant within the intracochlear spaces is shown with multislice CT. An imaging protocol is suggested.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center-Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands. gijs@vanwermeskerken.com
authors.forename: Gijs K A
authors.initials: GK
authors.lastname: van Wermeskerken
authors.forename: Mathias
authors.initials: M
authors.lastname: Prokop
authors.forename: Adriaan F
authors.initials: AF
authors.lastname: van Olphen
authors.forename: Frans W J
authors.initials: FW
authors.lastname: Albers
mesh_terms: D002102:Cadaver; D003051:Cochlea / Q000000981:diagnostic imaging*; D019929:Cochlear Implantation; D003054:Cochlear Implants; D005240:Feasibility Studies; D006801:Humans; D013701:Temporal Bone / Q000000981:diagnostic imaging / Q000601:surgery; D014057:Tomography, X-Ray Computed