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Applications of visualizing cochlear basal turn in cochlear implantation
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Journal Article
Applications of visualizing cochlear basal turn in cochlear implantation
2023
Overview
Objective To report a reliable method in obtaining optimal cochlear basal turn and cross‐section (c/s) of internal auditory canal (IAC) supporting Cochlear implantation (CI) procedure. Materials and Methods Computer tomography (CT) and magnetic resonance image (MRI) scans of potential CI candidates from 2018 to 2022 from the tertiary center were considered for analysis. Slicer software was used in three‐dimensional (3D) segmentation of inner ear and for capturing the cochlear basal turn. Results A total of 1932 head scans were made available for the analysis and out of which 1866 scans had normal anatomy (NA) inner ear. Incomplete partition (IP) type‐I was identified in 19 ears, IP type‐II in 27 ears, IP type‐III in 6 ears, cochlear hypoplasia (CH) type‐I in 6 ears, CH type‐II in 1 ear, CH type‐III in 3 ears, and CH type‐IV is 3 ears, and enlarged vestibular aqueduct syndrome in 1 ear. 3D segmented inner ear helped in successfully obtaining the cochlear basal turn and the c/s of IAC in all anatomical types. Time taken to capture the cochlear basal turn with the help of 3D segmented inner ear was <1 min. Within the NA category, five cases showed scalar ossification, and its extent was identified in the cochlear basal turn. Conclusion The identification and the extent of ossification in the scala tympani, shape of the basal turn, and the cochlear size measurement in cochlear basal turn has high clinical relevance as this helps in surgical planning and in choosing appropriate electrode length. Level of evidence: Level 2 to the best of our understanding. To report a reliable method in obtaining optimal cochlear basal turn and cross‐section (c/s) of internal auditory canal (IAC) supporting cochlear implantation procedure. The identification and the extent of ossification in the ST, shape of the basal turn, and the cochlear size measurement in cochlear basal turn have a high clinical relevance as these help in surgical planning and in choosing appropriate electrode length.
Publisher
John Wiley & Sons, Inc,Wiley
