Intraobserver and interobserver reproducibility in linear measurements on axial images obtained by cone-beam computed tomography.
- Author:
Nathália Cristine DA SILVA
1
;
Maurício BARRIVIERA
;
José Luiz Cintra JUNQUEIRA
;
Francine Kühl PANZARELLA
;
Ricardo RAITZ
Author Information
- Publication Type:Original Article
- Keywords: Cone-Beam Computed Tomography; Dimensional Measurement Accuracy; Reproducibility of Results
- MeSH: Cone-Beam Computed Tomography*; Dimensional Measurement Accuracy; Nylons; Observer Variation; Reproducibility of Results
- From:Imaging Science in Dentistry 2017;47(1):11-15
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: This study was performed to investigate the intra- and inter-observer variability in linear measurements with axial images obtained by PreXion (PreXion Inc., San Mateo, USA) and i-CAT (Imaging Sciences International, Xoran Technologies Inc., Hatfield, USA) CBCT scanners, with different voxel sizes. MATERIALS AND METHODS: A cylindrical object made from nylon with radiopaque markers (phantom) was scanned by i-CAT and PreXion 3D devices. For each axial image, measurements were taken twice in the horizontal (distance A-B) and vertical (distance C-D) directions, randomly, with a one-week interval between measurements, by four oral radiologists with five years or more experience in the use of these measuring tools. RESULTS: All of the obtained linear measurements had lower values than those of the phantom. The statistical analysis showed high intra- and inter-observer reliability (p=0.297). Compared to the real measurements, the measurements obtained using the i-CAT device and PreXion tomography, on average, revealed absolute errors ranging from 0.22 to 0.59 mm and from 0.23 to 0.63 mm, respectively. CONCLUSION: It can be concluded that both scanners are accurate, although the linear measurements are underestimations, with no significant differences between the evaluators.
