Preoperative cochlear implant imaging: is magnetic resonance imaging enough?
OBJECTIVE
To investigate the accuracy of magnetic resonance imaging (MRI) as a preoperative imaging technique for cochlear implant candidates.


METHODS
Retrospective, blinded.


METHODS
Tertiary medical center.


METHODS
31 cochlear implant candidates with various causes of hearing loss.


METHODS
Cochlear implant patients received preoperative high-resolution temporal bone computed tomography (CT), and high-resolution T2-weighted fast spin echo MRI (FSE-MRI). The images were read independently of each other and in a blinded manner by two neuroradiologists. The imaging results were also correlated with intraoperative findings.


METHODS
Lack of agreement between the findings for either imaging technique; also, lack of agreement between imaging findings and intraoperative findings.


RESULTS
FSE-MRI is equal to CT imaging in the detection of abnormalities of cochlear patency. It is better than CT imaging in detecting cochlear dysplasia and large vestibular aqueducts, and in determining the presence of the cochlear nerve.


CONCLUSIONS
FSE-MRI is accurate in predicting inner ear anomalies and obstruction of the cochlear lumen. It also adds information not gathered from CT imaging, such as the presence and size of the cochlear nerve.
Division of Otolaryngology-Head and Neck Surgery, University of Utah, Salt Lake City, USA.
S
S
Ellul
C
C
Shelton
H C
HC
Davidson
H R
HR
Harnsberger
D019929:Cochlear Implantation; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000191:economics / Q000379:methods*; D015588:Observer Variation; D018579:Patient Selection; D011237:Predictive Value of Tests; D011300:Preoperative Care / Q000191:economics / Q000379:methods*; D012189:Retrospective Studies; D016037:Single-Blind Method; D014057:Tomography, X-Ray Computed