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DOI: 10.1055/s-0040-1711138
Cochlear length estimation accuracy of an individual polynomial 3D-Model of the cochlea
The individual polynomial 3D-Model of the cochlea (Pietsch et al,, 2017) allows an estimation of the cochlear length with high accuracy up to the total length of the cochlea at the helicotrema. The commercially available System Otoplan (Version 2) allows a relatively accurate estimation of the cochlear length up to 900° (2,5 turns), however shows a significant deviation for the total length of the cochlea at the helicotrema.
The correlation of estimated values (3D-Model, Otoplan V1, Otoplan V2) with actually measured values based on 60 corrosion casts of human cochleae are shown.
An estimation of insertion depths of cochlear implant electrodes is possible with high accuracy for the 3D-Model of the cochlea, as well as with Otoplan V2. A frequencyspecific relation of the single electrode contacts (based on Greenwood) requires a correct estimation of the total length of the basilar membrane up to the helicotrema. This is possible with the individual polynomial 3D-Model of the cochlea and can be the basis for an individual frequencyoptimized mapping of the speech processor.
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Publication History
Article published online:
10 June 2020
© 2020. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).
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