Automatic graph-based method for localization of cochlear implant electrode arrays in clinical CT with sub-voxel accuracy

Cochlear implants (CIs) are surgically implanted devices for treating severe-to-profound hearing loss (National Institute on Deafness and Other Communication Disorders, 2011). A CI uses an electrode array implanted within the cochlea to stimulate the spiral ganglion (SG) nerves to induce the sensation of hearing. The SG nerves are tonotopically ordered by decreasing characteristic frequency along the length of the cochlea (Greenwood, 1990; Stakhovskaya et al., 2007) (Shown in Figure 1). A SG nerve is stimulated when the frequency associated with it exists in the incoming sound (Wilson and Dorman, 2008). (Source: Medical Image Analysis)

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