title: Image assessment of MSCT and CBCT scans for rapid maxillary expansion: a pilot study.
abstract: OBJECTIVE
  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.
  
  
  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.
  
  
  CONCLUSIONS
  Measurements acquired in the images were similar and these findings contribute to stimulate the use of CBCT for evaluation of the maxillary expansion procedure.
authors: UFRJ, Rio de Janeiro, Brazil. pollyanamoura@gmail.com
authors: Pollyana Marques
authors: PM
authors: Moura
authors: Gilson
authors: G
authors: Giraldi
authors: Pedro Henrique
authors: PH
authors: Lira
authors: Diego Augusto Quadrado
authors: DA
authors: Leite
authors: Paulo Sérgio Silva
authors: PS
authors: Rodrigues
authors: Marcelo
authors: M
authors: Faria
authors: Bianca
authors: B
authors: Gutfilen
mesh_terms: D003757:Dental Implantation / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D010155:Palatal Expansion Technique; D010159:Palate / Q000000981:diagnostic imaging*; D010865:Pilot Projects; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D011861:Radiography, Dental / Q000379:methods*; D015641:Radiography, Interventional / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*