title: Image quality evaluation of small FOV and large FOV CBCT devices for oral and maxillofacial radiology.
abstract: OBJECTIVE
  Quantitative and qualitative image quality evaluation of two different dental CBCT scanners.
  
  
  METHODS
  Two CBCT systems were evaluated in this study: one small field-of-view (FOV) (50-mm diameter) system that also allows two-dimensional (2D) dental panoramic imaging and one large FOV CBCT system (60-180-mm diameter). These devices were all tested with installed acquisition default modes and proprietary reconstruction software, enabling high-resolution bone imaging. Quantitative analyses were carried out to measure spatial resolution, linearity and homogeneity. Small-size phantoms and a human dry skull were used to evaluate intrinsic performances. Visual qualitative analyses of specific anatomical parts were blindly performed by 10 operators.
  
  
  RESULTS
  Concerning spatial resolution, small-voxel size protocols provide equivalent results on the two apparatus. In terms of linearity, all systems are highly linear (0.98 < r2< 0.99) over the range of signal intensities encountered. Our results, coming from either phantoms or the dry skull, demonstrate that the small FOV CBCT suffers from a lack of homogeneity.
  
  
  CONCLUSIONS
  For limited oral and maxillofacial volume imaging (diameter < 50 mm), the polyvalent small FOV CBCT (2D and three-dimensional imaging) system used in this study could reach performances similar to those of the large FOV CBCT.
authors: 1 Imagerie Préclinique, Pôle d'imagerie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.|2 Icube, équipe MMB, CNRS, Université de Strasbourg, Strasbourg, France.|3 Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Université de Strasbourg, Strasbourg, France.
authors: Jean-Philippe
authors: JP
authors: Dillenseger
authors: 3 Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Université de Strasbourg, Strasbourg, France.|4 Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.
authors: Catherine-Isabelle
authors: CI
authors: Gros
authors: 4 Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.
authors: Amira
authors: A
authors: Sayeh
authors: 5 Icube, équipe Mécaflu, Université de Strasbourg, Strasbourg, France.
authors: Johary
authors: J
authors: Rasamimanana
authors: 5 Icube, équipe Mécaflu, Université de Strasbourg, Strasbourg, France.
authors: Fabrice
authors: F
authors: Lawniczak
authors: 2 Icube, équipe MMB, CNRS, Université de Strasbourg, Strasbourg, France.|3 Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Université de Strasbourg, Strasbourg, France.|6 Institut d'Anatomie Normale, Université de Strasbourg, Strasbourg, France.
authors: Jean-Marie
authors: JM
authors: Leminor
authors: 1 Imagerie Préclinique, Pôle d'imagerie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
authors: Jean-François
authors: JF
authors: Matern
authors: 1 Imagerie Préclinique, Pôle d'imagerie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
authors: André
authors: A
authors: Constantinesco
authors: 3 Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Université de Strasbourg, Strasbourg, France.|4 Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.
authors: Fabien
authors: F
authors: Bornert
authors: 1 Imagerie Préclinique, Pôle d'imagerie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.|2 Icube, équipe MMB, CNRS, Université de Strasbourg, Strasbourg, France.|3 Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Université de Strasbourg, Strasbourg, France.
authors: Philippe
authors: P
authors: Choquet
mesh_terms: D054893:Cone-Beam Computed Tomography / Q000295:instrumentation*; D006801:Humans; D066298:In Vitro Techniques; D019047:Phantoms, Imaging; D011861:Radiography, Dental / Q000295:instrumentation*; D012886:Skull / Q000000981:diagnostic imaging
keywords: CBCT; bone imaging; dental imaging; quantitative evaluation; radiologic phantoms