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International Journal of Computer Assisted Radiology and Surgery

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01-03-2018 | Original Article

Patient-specific estimation of detailed cochlear shape from clinical CT images

Authors: H. Martin Kjer, Jens Fagertun, Wilhelm Wimmer, Nicolas Gerber, Sergio Vera, Livia Barazzetti, Nerea Mangado, Mario Ceresa, Gemma Piella, Thomas Stark, Martin Stauber, Mauricio Reyes, Stefan Weber, Marco Caversaccio, Miguel Ángel González Ballester, Rasmus R. Paulsen

Published in: International Journal of Computer Assisted Radiology and Surgery | Issue 3/2018

Abstract

Purpose

A personalized estimation of the cochlear shape can be used to create computational anatomical models to aid cochlear implant (CI) surgery and CI audio processor programming ultimately resulting in improved hearing restoration. The purpose of this work is to develop and test a method for estimation of the detailed patient-specific cochlear shape from CT images.

Methods

From a collection of temporal bone \(\mu \)CT images, we build a cochlear statistical deformation model (SDM), which is a description of how a human cochlea deforms to represent the observed anatomical variability. The model is used for regularization of a non-rigid image registration procedure between a patient CT scan and a \(\mu \)CT image, allowing us to estimate the detailed patient-specific cochlear shape.

Results

We test the accuracy and precision of the predicted cochlear shape using both \(\mu \)CT and CT images. The evaluation is based on classic generic metrics, where we achieve competitive accuracy with the state-of-the-art methods for the task. Additionally, we expand the evaluation with a few anatomically specific scores.

Conclusions

The paper presents the process of building and using the SDM of the cochlea. Compared to current best practice, we demonstrate competitive performance and some useful properties of our method.

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Title: Patient-specific estimation of detailed cochlear shape from clinical CT images
Authors: H. Martin Kjer
Jens Fagertun
Wilhelm Wimmer
Nicolas Gerber
Sergio Vera
Livia Barazzetti
Nerea Mangado
Mario Ceresa
Gemma Piella
Thomas Stark
Martin Stauber
Mauricio Reyes
Stefan Weber
Marco Caversaccio
Miguel Ángel González Ballester
Rasmus R. Paulsen
Publication date: 01-03-2018
Publisher: Springer International Publishing
Published in: International Journal of Computer Assisted Radiology and Surgery / Issue 3/2018
Print ISSN: 1861-6410
Electronic ISSN: 1861-6429
DOI: https://doi.org/10.1007/s11548-017-1701-7

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Patient-specific estimation of detailed cochlear shape from clinical CT images

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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