Radiological evaluation of temporal bone surgical landmarks for a transcanal transpromontorial approach to the internal auditory canal using three-dimensional computed tomography

ObjectiveThis study aimed to analyse a three-dimensional transcanal transpromontorial approach to the internal auditory canal using three-dimensional computed tomography.MethodThis study was a retrospective investigation of 48 ears of 24 patients using three-dimensional reconstruction data from norm...

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Bibliographic Details
Published in:Journal of laryngology and otology 2022-11, Vol.136 (11), p.1056-1061
Main Authors: Jun, B C, Song, S W
Format: Article
Language:English
Subjects:
Cochlea
Computed tomography
Ear canal
Ears & hearing
Endoscopy
Facial nerve
Hearing
Main Article
Surgery
Temporal bone
Tomography
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Summary:ObjectiveThis study aimed to analyse a three-dimensional transcanal transpromontorial approach to the internal auditory canal using three-dimensional computed tomography.MethodThis study was a retrospective investigation of 48 ears of 24 patients using three-dimensional reconstruction data from normal temporal bone computed tomography. The inner structures of the temporal bone were three-dimensionally reconstructed. Eight points were marked in the three-dimensional object with reference to the axial, coronal and sagittal plane images of the computed tomography scans. Distances and angles to each point were measured from the oval and round windows.ResultsThe point of the facial nerve from the internal auditory canal to the labyrinthine segment could be traced between the cochlear apex and the geniculate ganglion based on the oval window.ConclusionThis technique helps with identifying the locations of important surgical landmarks using three-dimensional reconstructions of pre-operative computed tomography scans and to identify the facial nerve from the internal auditory canal during surgery.
ISSN:0022-2151
1748-5460
DOI:10.1017/S002221512100339X