Automatic localization of closely spaced cochlear implant electrode arrays in clinical CTs

Abstract

Our validation study shows that our method can localize closely spaced CI arrays with an accuracy close to what is achievable by an expert on clinical CTs. This represents a crucial step toward automating IGCIP and translating it from the laboratory to the clinical workflow.

Computed-tomography estimates of interaural mismatch in insertion depth and scalar location in bilateral cochlear-implant users

“…Post-operative CT scan and image analysis [29][30][31][32][33][34] Med-El users (all both straight).…”

“…To determine the intra-cochlear location of the electrodes, patient-specific cochlea shape was derived from the patient CT scans using a model that includes segmentation of the intra-cochlear anatomy [29][30][31][32][33][34] . This analysis quantifies the estimated electrode position in three dimensions.…”

“…Post-operative CT scan and image analysis 29-34 was performed on 107 BI-CI users from Vanderbilt University and University of Maryland-College Park. The study population included 27 Advanced Bionics users (13 both pre-curved, 10 both straight, 4 mixed), 62 Cochlear Ltd. users (49 both pre-curved, 3 both straight, 10 mixed), and 18 Med-El users (all both straight).…”

Musical Sound Quality as a Function of the Number of Channels in Modern Cochlear Implant Recipients

“…Twenty-one post-lingually deafened adult CI recipients participated in this study. Electrode placement, including scalar location, average electrode-to-modiolus distance (trueM¯), and angular insertion depth were determined by CT imaging using validated CI position analysis algorithms (e.g., Noble et al, 2013; Zhao et al, 2018, 2019). CI programs were created using 4–22 electrodes with equal spatial distribution of active electrodes across the array.…”

“…All experimental activities were completed in accordance with IRB approved protocols at the Vanderbilt University and the Vanderbilt University Medical Center. Electrode placement, including scalar location, mean and variance of electrode-to-modiolus distance, and angular insertion depth were all determined by CT imaging using validated CI position analysis algorithms (Noble et al, 2013; Zhao et al, 2018, 2019). These algorithms were created using a statistical shape model of 10 cadaver temporal bone microCT images.…”