Cone-Beam CT Versus Multi-slice CT Systems for Postoperative Imaging of Cochlear Implantation—A Phantom Study on Image Quality and Radiation Exposure Using Human Temporal Bones

Autor: Jacob Geleijns, Berit M. Verbist, Thomas J.J. Maal, Raoul M. S. Joemai, Emmanuel A. M. Mylanus, Henricus J Theunisse
Rok vydání: 2015
Předmět:
medicine.medical_specialty
Tomography Scanners
X-Ray Computed
Multi-detector computed tomography
Image quality
medicine.medical_treatment
Other Research Donders Center for Medical Neuroscience [Radboudumc 0]
Radiation Dosage
Phantoms
Imaging phantom
Imaging
stomatognathic system
Cochlear implant
Cadaver
medicine
Humans
Postoperative Period
Radiometry
Cochlear implantation
Cone beam ct
Phantoms
Imaging
business.industry
Cone-beam computed tomography
Temporal Bone
equipment and supplies
Sensory Systems
Cochlea
Acquisition Protocol
Reconstructive and regenerative medicine Radboud Institute for Health Sciences [Radboudumc 10]
Radiation exposure
Multi slice ct
Cochlear Implants
Otorhinolaryngology
Radiographic Image Interpretation
Computer-Assisted
Neurology (clinical)
Radiology
Tomography
X-Ray Computed
business
Nuclear medicine
Rare cancers Radboud Institute for Health Sciences [Radboudumc 9]
Zdroj: Otology and Neurotology, 36(4), 592-599
Otology & Neurotology, 36, 592-599
Otology & Neurotology, 36, 4, pp. 592-599
ISSN: 1531-7129
DOI: 10.1097/mao.0000000000000673
Popis: Hypothesis Image quality of low-dose multi-slice computed tomography (MSCT) after cochlear implantation is comparable to that of cone-beam computed tomography (CBCT). Background CBCT has been described as a low-dose alternative with superior image quality to MSCT for postoperative cochlear implant (CI) imaging, but to our knowledge, no dose-matched comparisons of image quality have been published. Materials and methods Five human cochleae were implanted with CI electrodes and scanned on two CBCT and two MSCT systems. Four independent observers rated aspects of image quality on a five-point scale. CBCT scans were compared to clinical and dose-matched MSCT scans. Declining-dose MSCT protocols were compared to the clinical protocol. CT phantoms were used to determine effective dose and resolution for each acquisition protocol. Results Effective dose of the CBCT protocols was 6 to 16% of the clinical MSCT dose. Visibility of cochlear inner and outer walls and overall image quality were positively correlated with radiation dose on MSCT and image quality was better with clinical MSCT than with CBCT protocols. In other comparisons, differences between systems were found, but a distinction between CBCT and MSCT could not be made. Conclusion CBCT and dose-matched MSCT are both suitable for postoperative CI imaging. Selecting a CT system and radiation dose depends on which cochlear structures need to be visualized.
Databáze: OpenAIRE
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