Proceedings ArticleDOI
Cochlear implant electrode localization in post-operative CT using a spherical measure
Benjamin Braithwaite,H. Martin Kjer,Jens Fagertun,Miguel Ángel González Ballester,Anandhan Dhanasingh,Pavel Mistrik,Nicolas Gerber,Rasmus Reinhold Paulsen +7 more
- pp 1329-1333
TLDR
This paper presents a method for automatically locating and determining the ordering of electrode contacts on implanted electrode arrays from post-operative CT images based on a threshold and spherical measure, and selects contact positions at local maxima in the filtered image.Abstract:
When implanting cochlear implants the positions of electrodes have a large impact on the quality of the restored hearing. Due to metal artifacts it is difficult to estimate the precise location in post-operative scans. In this paper we present a method for automatically locating and determining the ordering of electrode contacts on implanted electrode arrays from post-operative CT images. Our method applies a specialized filter chain to the images based on a threshold and spherical measure, and selects contact positions at local maxima in the filtered image. Two datasets of 13 temporal bone specimens scanned in CBCT are used to validate the method, which successfully locates the electrode array in every image.read more
Citations
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Journal ArticleDOI
Automatic graph-based method for localization of cochlear implant electrode arrays in clinical CT with sub-voxel accuracy.
TL;DR: A novel method for localizing different brands of CI electrodes in clinical CTs, which outperforms the state‐of‐art CI electrode localization methods and achieves a mean error of 0.12 mm when compared to expert manual localization results.
Journal ArticleDOI
Automatic localization of closely spaced cochlear implant electrode arrays in clinical CTs
TL;DR: An image-guided cochlear implant programming (IGCIP) system based on a significant correlation between hearing outcomes and the intracochlear locations of the electrodes and can localize closely spaced CI arrays with an accuracy close to what is achievable by an expert on clinical CTs is developed.
Journal ArticleDOI
Fabrication and validation of reference structures for the localization of subdural standard- and micro-electrodes in MRI.
Johannes B. Erhardt,Thomas Lottner,Cristian Pasluosta,Isabel Gessner,Sanjay Mathur,Martin Schuettler,Michael Bock,Thomas Stieglitz +7 more
TL;DR: The precise localization of subdural micro- and standard electrodes in magnetic resonance imaging (MRI) in phantom experiments is validated and post-implantation electrode localization using MRI may be advantageous compared to the common alternative of CT-MRI image co-registration.
Proceedings ArticleDOI
Localization Of Cochlear Implant Electrodes From Cone Beam Computed Tomography Using Particle Belief Propagation
TL;DR: In this article, a Markov random field (MRF) model was proposed for CI electrode localization for cone beam computed tomography (CBCT) data-sets, where intensity and shape of electrodes were included as prior knowledge as well as distance and angles between contacts.
Posted Content
Validation of image-guided cochlear implant programming techniques.
TL;DR: A ground truth dataset with conventional CT and micro-CT images of 35 temporal bone specimens is created to both rigorously characterize the accuracy of these two steps and assess how inaccuracies in these steps affect the overall results.
References
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Multimodality image registration by maximization of mutual information
TL;DR: The results demonstrate that subvoxel accuracy with respect to the stereotactic reference solution can be achieved completely automatically and without any prior segmentation, feature extraction, or other preprocessing steps which makes this method very well suited for clinical applications.
Journal ArticleDOI
Impact of electrode design and surgical approach on scalar location and cochlear implant outcomes.
George B. Wanna,Jack H. Noble,Matthew L. Carlson,René H. Gifford,Mary S. Dietrich,David S. Haynes,Benoit M. Dawant,Robert F. Labadie +7 more
TL;DR: The goal of this study was to analyze the relationship between surgical approach and electrode type with final intracochlear position of the electrode array and subsequent hearing outcomes.
Book ChapterDOI
Automatic Localization of Cochlear Implant Electrodes in CT
TL;DR: A fully automatic snake-based method for accurately localizing CI electrodes in clinical post-implantation CTs and results indicate that the method could be used in future large scale studies to analyze the relationship between electrode position and hearing outcome, which potentially could lead to technological advances that improve hearing outcomes with CIs.
Journal ArticleDOI
Cone Beam and Micro-Computed Tomography Validation of Manual Array Insertion for Minimally Invasive Cochlear Implantation
Wilhelm Wimmer,Brett Bell,Markus E. Huth,Christian Weisstanner,Nicolas Gerber,Martin Kompis,Stefan Weber,Marco Caversaccio +7 more
TL;DR: Manual electrode array insertion following a DCA procedure seems to be feasible and safe and is a further step toward clinical application of image-guided otological microsurgery.
Proceedings ArticleDOI
Automatic identification of cochlear implant electrode arrays for post-operative assessment
TL;DR: An approach based on parametric Gradient Vector Flow snakes to segment the electrode array in post-operative CT to permit accurate assessment of the implant position in vivo is presented.