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The study protocol was approved by the local Institutional Review Board. All legal guardians of participants agreed to participate in the functional MRI study and provided oral informed consent or assent where appropriate. Patient demographics are summarized in Table 1. There was no significant difference in age at time of surgery between the groups ( P>0.05). In the poor outcome group, the mean age at time of surgery was 25.1 months (range, 19 to 35 months).

In the good outcome group, the mean age at time of surgery was 40.6 months (range, 19 to 77 months). In addition to CAP, open-set sentence perception and open-set word perception test were measured, as well. There was no difference in age between the groups ( P>0.05). Among the 18 patients, 10 patients (mean age, 6.7в’.0 years) with categories of auditory performance (CAP) score over 6 were classified into the good outcome group and 8 patients (mean age, 5.06вђ.8 years) with CAP score below 6 were classified into the poor outcome group. MRI and DTI scans were performed before the surgeries. In temporal bone CT, there were no inner ear anomalies. All the patients were deaf prelingually and the causes of deafness were unknown. However, few studies have examined the utility of functional imaging in assessing the possible outcome of CI.Д®ighteen patients (11 males, 7 females mean age, 5.9 years) with profound sensorineural hearing loss participated in this study. In some cases, a magnetic resonance imaging (MRI) scan is used instead of CT when questions exist regarding the presence of the eighth nerve or severe ossification. For imaging evaluation, computer tomography (CT) scanning is performed to evaluate the status of the cochlea and to establish the presence of a non-ossified cochlea or to identify a common cavity, Mondini dysplasia, enlarged vestibular aqueduct, or an ossified cochlea. Otoacoustic emission (OAE) testing complements these studies. Typically, evaluations include pure-tone audiometry and auditory brainstem response (ABR) testing in the case of children. At the time of the medical evaluation for CI, a complete neuro-otologic and otolaryngologic examination is performed ( 2). Cochlear implantation (CI) has become a routine surgical procedure worldwide for the management of severe-to-profound sensorineural hearing loss ( 1).

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