Clinical Validation of Manual Measurement of Cochlea Length With Post-Operative Electrode Insertion Depth: A Pilot Study.

Objective: To clinically validate manual measurement of cochlear length from pre-operative image of cochlea with post-operative image of cochlear implant (CI) electrode.

Methods: Temporal bone computer tomography (CT) scans of 23 ears were available for this pilot study. The inner ear was three-dimensionally (3D) segmented, and cochlea length was manually measured for preferred angular depth depending on inner ear anatomical types for CI electrode length selection.