Morphologic examination of the temporal bone by cone beam computed tomography: Comparison with multislice helical computed tomography

Summary Introduction High-resolution CT imaging is essential to diagnosis and follow-up of temporal bone pathology. Morphologically, CT is the reference examination. The requirement of long-term follow-up thus exposes patients to cumulative radiation doses. Limiting exposure to ionizing radiation is...

Full description

Saved in:
Bibliographic Details
Published in:European annals of otorhinolaryngology, head and neck diseases head and neck diseases, 2011-11, Vol.128 (5), p.230-235
Main Authors: Dahmani-Causse, M, Marx, M, Deguine, O, Fraysse, B, Lepage, B, Escudé, B
Format: Article
Language:English
Subjects:
Cadaver
Cone beam
Cone-Beam Computed Tomography
Ear Ossicles - diagnostic imaging
Humans
Image Processing, Computer-Assisted
Imaging
Multidetector Computed Tomography
Neuroradiology
Otolaryngology
Otology
Radiation Dosage
Temporal bone
Temporal Bone - diagnostic imaging
Tomography, Spiral Computed
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Summary Introduction High-resolution CT imaging is essential to diagnosis and follow-up of temporal bone pathology. Morphologically, CT is the reference examination. The requirement of long-term follow-up thus exposes patients to cumulative radiation doses. Limiting exposure to ionizing radiation is an increasing concern of public health authorities. The principal advantage of Cone Beam CT (CBCT) lies in a significant reduction in radiation dose. The main objective of the present study was to assess the morphologic concordance between CBCT and Multislice Helical Computed Tomography (MSCT) on 20 anatomic landmarks corresponding to regions of interest in clinical practice. The secondary objectives were to compare the two techniques qualitatively in stapes and footplate assessment and measurement of footplate thickness, and quantitatively in terms of dosimetry. Material and methods An experimental anatomical study was performed on 12 temporal bones from fresh human cadavers of unknown clinical history. Each underwent CBCT and MSCT. Results There was no significant difference in morphologic assessment of the temporal bones on the two techniques. Exploration of the stapes, incudostapedial joint, anterior stapediovestibular joint and footplate was qualitatively more precise on CBCT, and footplate thickness showed less overestimation than on MSCT. CBCT delivered 22 times less radiation than MSCT under the present experimental conditions. Conclusion CBCT provides reliable morphologic assessment of temporal bone, thanks to higher spatial resolution than on MSCT, with significantly reduced radiation dose.
ISSN:1879-7296
1879-730X
DOI:10.1016/j.anorl.2011.02.016