This document discusses cochlear implants, including: - Indications for cochlear implants are profound to severe bilateral sensorineural hearing impairment. - The implant converts sound into electrical signals that stimulate the auditory nerve. - Preoperative imaging assesses anatomy like the cochlear nerve and ducts for patient selection. - Postoperative imaging evaluates electrode placement depth and angle, and identifies any complications like infections. - Proper electrode positioning and monitoring for complications are important aspects of postoperative imaging reports.