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

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Moura P.M.
Giraldi G.
Lira P.H.
Leite D.A.Q.
Rodrigues P.S.S.
Faria M.
Gutfilen B.
Computer Methods in Biomechanics and Biomedical Engineering
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MOURA, P. M.; GIRALDI, G.; LIRA, P. H.; LEITE, D. A. Q.; RODRIGUES, Paulo; FARIA, M.; GUTFILEN, B. Image assessment of MSCT and CBCT scans for rapid maxillary expansion: a pilot study. Computer Methods in Biomechanics and Biomedical Engineering, v. 14, n. 12, p. 1089-1095, 2011.
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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. © 2011 Taylor & Francis.