title: Evaluation of a limited cone-beam volumetric imaging system: comparison with film radiography in detecting incipient proximal caries.
abstract: OBJECTIVE
  To assess the accuracy of a limited cone-beam volumetric imaging system in detecting incipient proximal caries.
  
  
  METHODS
  Fifty extracted premolars were used. On 100 surfaces examined, 71 proximal carious lesions were found; 47 were limited to the enamel, and 24 penetrated into the dentin. A limited cone-beam volumetric imaging system (CBVI), 3D Accuitomo (J. Morita Mfg. Corp., Kyoto, Japan), was used. Insight films (Eastman Kodak, Rochester, NY) were used for comparison. Seven experienced oral radiologists determined the presence of lesions using a continuous rating scale. The area measure (Az) values were calculated from the receiver operating characteristic curve obtained for each modality and observer.
  
  
  RESULTS
  The mean Az-values were 0.63 +/- 0.02 for 3D Accuitomo and 0.63 +/- 0.03 for film. Analysis of variance showed no statistically significant difference between 3D Accuitomo and film.
  
  
  CONCLUSIONS
  A limited CBVI, 3D Accuitomo, could not enhance the accuracy in detecting proximal carious lesions.
authors.affiliation: Department of Radiology, Showa University School of Medicine, Tokyo, Japan.
authors.forename: Ryoko
authors.initials: R
authors.lastname: Tsuchida
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Araki
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Okano
mesh_terms: D000704:Analysis of Variance; D003731:Dental Caries / Q000000981:diagnostic imaging* / Q000473:pathology; D003743:Dental Enamel / Q000000981:diagnostic imaging / Q000473:pathology; D003804:Dentin / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*