Image assessment of MSCT and CBCT scans for rapid maxillary expansion: a pilot study

Pollyana Moura, Gilson Giraldi, Pedro Lira, Diego Leite, Paulo Rodrigues, Marcelo Faria and Bianca Gutfilen

Computer Methods in Biomechanics and Biomedical Engineering, 2011, vol. 14, issue 12, 1089-1095

Abstract: Objectives: The accuracy of cone-beam technique, cone-beam computed tomography (CBCT), compared with that of the multislice spiral CT (MSCT), for image-based linear measurements of midpalatal suture was assessed.Material and Methods: Two measurements were performed by one investigator on the dry skull by using one digital caliper and in the axial cuts by using software. A 2D object-based image registration process was applied to determine the best affine transformation that maps a 2D input image (CBCT) in a reference image (MSCT).Results: The value of the intraclass correlation coefficient was approximately 0.9%. The results suggest that differences between two scanners did not exist (observation 1, p = 0.964 and observation 2, p = 0.795). With regard to the dry skull and the image, the significance probabilities equaled zero (observation 1, p = 0.002 and observation 2, p = 0.004), therefore, indicating significant differences.Conclusion: Measurements acquired in the images were similar and these findings contribute to stimulate the use of CBCT for evaluation of the maxillary expansion procedure.

Date: 2011
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DOI: 10.1080/10255842.2010.511618

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