Objective: To evaluate the diagnostic concordance between multislice computed tomography (MSCT) and cone beam computed tomography (CBCT) in the early postoperative assessment of patients after cochlear implantation. Study Design: Prospective, randomized, single-center, interventional, pilot study on the diagnostic performance of a medical device. Setting: Tertiary referral center. Patients: Patients aged over 18 years requiring a CT scan after cochlear implant surgery. Interventions: Nine patients were implanted with electrode arrays from three different manufacturers, including one bilateral. High-resolution MSCT and CBCT were then performed, and 2 experienced radiologists blinded to the imaging modality evaluated the randomized images, twice.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
9
Patients had an additional Cone Beam Computed Tomography, after the usual MDCT
Patients had a usual MDCT, before having an additional Cone Beam Computed Tomography
Service imagerie pavillon B, Hopital E. Herriot
Lyon, France
Concordance between MDCT and CBCT for assessing the scalar position of the electrodes
Blinded images were analyzed in random order by 2 radiologists with several years of experience in temporal bone imaging. Each radiologist analyzed on the workstation the images of each patient twice at 4- to 8-week intervals. A consensus reading was performed by a third experienced radiologist in case of discordance. Each radiologist determined CI localization. The cochlear implant (CI) was considered within the scala tympani if it was in the most posterior scala on axial reconstructions passing through the cochlea (behind the osseous spiral lamina often seen).
Time frame: At inclusion
length of the intracochlear electrode array
Blinded images were analyzed in random order by 2 radiologists with several years of experience in temporal bone imaging. Each radiologist analyzed on the workstation the images of each patient twice at 4- to 8-week intervals. A consensus reading was performed by a third experienced radiologist in case of discordance. This measurement was performed in the oblique coronal plane of the cochlea.
Time frame: At inclusion
percentage of implanted cochlea
Blinded images were analyzed in random order by 2 radiologists with several years of experience in temporal bone imaging. Each radiologist analyzed on the workstation the images of each patient twice at 4- to 8-week intervals. A consensus reading was performed by a third experienced radiologist in case of discordance. This measurement was performed in the oblique coronal plane of the cochlea.
Time frame: At inclusion
number of intracochlear electrodes
Blinded images were analyzed in random order by 2 radiologists with several years of experience in temporal bone imaging. Each radiologist analyzed on the workstation the images of each patient twice at 4- to 8-week intervals. A consensus reading was performed by a third experienced radiologist in case of discordance. This measurement was performed in the oblique coronal plane of the cochlea.
Time frame: At inclusion
radiation dose
Radiation dose was estimated using Computed Tomography Dose Index (CTDI, in Gy.cm) for each patient and scanner. These data are collected directly from the data sheet for each examination (also anonymised).
Time frame: At inclusion
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.