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

Published online by Cambridge University Press:  16 August 2022

B C Jun Open the ORCID record for B C Jun [Opens in a new window]  and
S W Song
B C Jun
Affiliation:
Department of Otorhinolaryngology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
S W Song*
Affiliation:
Department of Radiology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
*
Author for correspondence: Dr S W Song, Department of Radiology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 271, Cheonbo-Ro, Uijeongbu-si, Gyeonggi-do 11765, Republic of Korea E-mail: swsong7@catholic.ac.kr
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Abstract

Objective

This study aimed to analyse a three-dimensional transcanal transpromontorial approach to the internal auditory canal using three-dimensional computed tomography.

Method

This 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.

Results

The 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.

Conclusion

This 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.

Keywords

Three-DimensionalComputed TomographyApproachTemporal BoneFacial Nerve
Type
Main Article
Information
The Journal of Laryngology & Otology , Volume 136 , Issue 11 , November 2022 , pp. 1056 - 1061
Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of J.L.O. (1984) LIMITED

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Footnotes

Dr S W Song takes responsibility for the integrity of the content of the paper

References

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