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. 2012 Mar;42(1):25-33.
doi: 10.5624/isd.2012.42.1.25. Epub 2012 Mar 22.

Evaluation of accuracy of 3D reconstruction images using multi-detector CT and cone-beam CT

Mija Kim  1 , Kyung-Hoe Huh, Won-Jin Yi, Min-Suk Heo, Sam-Sun Lee, Soon-Chul Choi
Affiliations

Evaluation of accuracy of 3D reconstruction images using multi-detector CT and cone-beam CT

Mija Kim et al. Imaging Sci Dent. 2012 Mar.

Abstract

Purpose: This study was performed to determine the accuracy of linear measurements on three-dimensional (3D) images using multi-detector computed tomography (MDCT) and cone-beam computed tomography (CBCT).

Materials and methods: MDCT and CBCT were performed using 24 dry skulls. Twenty-one measurements were taken on the dry skulls using digital caliper. Both types of CT data were imported into OnDemand software and identification of landmarks on the 3D surface rendering images and calculation of linear measurements were performed. Reproducibility of the measurements was assessed using repeated measures ANOVA and ICC, and the measurements were statistically compared using a Student t-test.

Results: All assessments under the direct measurement and image-based measurements on the 3D CT surface rendering images using MDCT and CBCT showed no statistically difference under the ICC examination. The measurements showed no differences between the direct measurements of dry skull and the image-based measurements on the 3D CT surface rendering images (P>.05).

Conclusion: Three-dimensional reconstructed surface rendering images using MDCT and CBCT would be appropriate for 3D measurements.

Keywords: Reproducibility of Results; Skull; Three-Dimensional Image.

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Figures

Fig. 1
Fig. 1
An example of dry skull specimen with mandible fixed to the cranium.
Fig. 2
Fig. 2
An example of MDCT 3D image (left) and CBCT 3D image (right) on OnDemend™ (Cybermed, Seoul, Korea) software.
Fig. 3
Fig. 3
A modified digital caliper to measure distance between landmarks located in concave surface.
Fig. 4
Fig. 4
An example of measurement between mid-sagittal landmarks using OnDemand. A. MDCT. B. CBCT.
See this image and copyright information in PMC

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