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. 2022 Nov 23;9:1054342. doi: 10.3389/fsurg.2022.1054342

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© 2022 Blijleven, Willemsen, Bleys, Stokroos, Wegner and Thomeer.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Measurement of the minimum and maximum diameter of the osseous external auditory canal (OEAC). (A) Segmentation and conversion of the preoperative temporal bone images into a three-dimensional (3D) model. (B) Detection of the elliptical shape of each 0.3 slice of the OEAC in the preoperative 3D model. (C) Crossections of the OEAC perpendicular to the viewing direction of the otorhinolaryngologist. (D) The maximum diameter (blue line) and minimum diameter (red line) of one slice of the OEAC.