Inﬂuence of voxel size on the accuracy of linear measurements taken in CBCT images
Keywords:Radiology, Cone-Beam Computed Tomography, Voxel.
AbstractObjectives: Cone-beam computed tomography (CBCT) has brought innovation to imaging examination methods, and has shown great potential in the maxillofacial area. The aim of this study was to evaluate the infl uence of different resolution values on the accuracy of linear measurements performed using a CBCT system. Methods: Seven pig mandibles were used in this study. Measurements were taken of the mesiodistal distance of the right and left fi rst molars. The mandibles were scanned using an iCAT CBCT apparatus and different voxel sizes, namely 0.125 and 0.25 mm. The images thus obtained were visualized using Xoran CT software, and the linear measurements were taken at different times by two examiners who used the software’s electronic ruler. A digital caliper was used to perform the measurements on the anatomical specimens. The data were analyzed statistically. Results: The results indicated no statistically signifi cant difference between the measurements obtained by both examiners. As for the methods used in this study, no statistically signifi cant difference was observed between the measurements obtained with the digital caliper and those obtained using CBCT. Similarly, no signifi cant difference was observed between the measurements obtained using the different CBCT protocols. Conclusion: There is no signifi cant difference between linear measurements obtained from CBCT images with 0.125 or 0.25 mm voxel sizes.
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