Three-dimensional reconstruction of the temporal bone: Comparison of in situ, CT, and CBCT measurements - 10/11/18
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Abstract |
Objective |
To evaluate the accuracy of three-dimensional (3D) Cone Beam Computed Tomography (CBCT) and Computed Tomography (CT) reconstructions of human temporal bones compared with in situ measurements.
Material and methods |
Experimental anatomical study of 10 human temporal bones. Wilcoxon's test was used to compare 8 distances on each temporal bone measured in situ and then on 3D CT and CBCT reconstructions. Six landmarks were used: external auditory canal (EAC), tip of the mastoid process, tip of the occiput, zygoma, a point situated 1cm above the tip of the mastoid process (T0) (open technique: lower limit of the mastoidectomy), head of stapes.
Results |
No significant difference was observed between the 3 measuring techniques for any of the distances studied (P>0.05).
Discussion |
This study demonstrates the equivalence of CBCT and CT for temporal bone measurements.
Conclusion |
CBCT is a new imaging modality providing 3D reconstructions of the temporal bone that are as reliable as those obtained by CT. As a result of better spatial resolution compared to CT, CBCT is associated with a significantly lower radiation dose. This technique constitutes a morphological progress, as CBCT is comparable to CT, allowing investigation of pathological ears with a lower radiation dose.
Le texte complet de cet article est disponible en PDF.Keywords : Cone beam computed tomography (CBCT), Computed tomography (CT), Temporal bone, Three-dimensional (3D) reconstruction
Plan
Vol 135 - N° 6
P. 393-398 - décembre 2018 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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