Pollyana Marques de Moura1, Rami R Hallac2, James R Seaward3, Alex A Kane3, Marcelo Aguiar4, Ronir Raggio5, Bianca Gutfilen4. 1. Department of Radiology, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil. Electronic address: pollyanamdemoura@gmail.com. 2. Children's Medical Center, Analytical Imaging and Modeling (AIM) Center, Dallas, TX, USA. 3. University of Texas Southwestern Medical Center, Plastic Surgery Department, Dallas, TX, USA. 4. Department of Radiology, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil. 5. Department of Biostatistics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Abstract
OBJECTIVES: The purpose of this study was to optimize the exposure parameters for cone beam computed tomography (CBCT) for performing diagnostic imaging of maxillary alveolar bone. STUDY DESIGN: CBCT (Promax 3 D Max) was performed on a frozen human cadaver head. Image homogeneity and the degree of alveolar bone contrast were determined by objective assessment using ImageJ software and subjective assessment by orthodontists and oral radiologists. Kruskal-Wallis tests and interrater agreement were used to compare results across groups. RESULTS: Image homogeneity and degree of alveolar bone contrast differed significantly among all exposure protocols (P < .001). Intraclass correlation values ranged from 0.681 to 0.779, with orthodontists having higher values compared with oral radiologists. Average of image quality scores between protocols were statistically significant (P < .001) and ranged from "fair" to "good." CONCLUSIONS: There is great potential to reduce CBCT radiation doses for maxillary alveolar bone while maintaining adequate image quality for diagnosis.
OBJECTIVES: The purpose of this study was to optimize the exposure parameters for cone beam computed tomography (CBCT) for performing diagnostic imaging of maxillary alveolar bone. STUDY DESIGN: CBCT (Promax 3 D Max) was performed on a frozen human cadaver head. Image homogeneity and the degree of alveolar bone contrast were determined by objective assessment using ImageJ software and subjective assessment by orthodontists and oral radiologists. Kruskal-Wallis tests and interrater agreement were used to compare results across groups. RESULTS: Image homogeneity and degree of alveolar bone contrast differed significantly among all exposure protocols (P < .001). Intraclass correlation values ranged from 0.681 to 0.779, with orthodontists having higher values compared with oral radiologists. Average of image quality scores between protocols were statistically significant (P < .001) and ranged from "fair" to "good." CONCLUSIONS: There is great potential to reduce CBCT radiation doses for maxillary alveolar bone while maintaining adequate image quality for diagnosis.
Authors: Anne Caroline Oenning; Ruben Pauwels; Andreas Stratis; Karla De Faria Vasconcelos; Elisabeth Tijskens; Annelore De Grauwe; Reinhilde Jacobs; Benjamin Salmon Journal: Sci Rep Date: 2019-04-02 Impact factor: 4.379