Localization of cochlear implant: electrodes in radiographs

Citation
Sy. Yang et al., Localization of cochlear implant: electrodes in radiographs, MED PHYS, 27(4), 2000, pp. 775-777
Citations number
22
Categorie Soggetti
Radiology ,Nuclear Medicine & Imaging","Medical Research Diagnosis & Treatment
Journal title
MEDICAL PHYSICS
ISSN journal
00942405 → ACNP
Volume
27
Issue
4
Year of publication
2000
Pages
775 - 777
Database
ISI
SICI code
0094-2405(200004)27:4<775:LOCIEI>2.0.ZU;2-Y
Abstract
Multielectrode cochlear implantation is the most effective treatment for pr ofound sensorineural hearing loss. In vivo three-dimensional 3-D localizati on of cochlear implant electrodes is important for modeling of the electric al field in the cochlea, design of electrode arrays, and may improve speech processor programming for better speech recognition. The prerequisite for 3-D localization of the electrodes is their 2-D localization in x-ray radio graphs. In this paper, we develop a practical method to localize the electr odes with high efficiency, accuracy, and reproducibility. In this method, a priori knowledge of the electrodes and their approximate positions are uti lized, an intelligent thresholding and segmentation mechanism is embedded, and the electrode center is computed as the weighted geometric center of se gmented electrode pixels. Experiments with physical phantoms and human data demonstrate the feasibility and utility of this method. The PC-based progr am developed for this project is disseminated on the Web, (C) 2000 American Association of Physicists in Medicine.