title: Phantom gastric mucosa for evaluating computed radiography in double-constrast upper gastrointestinal examinations.
abstract: OBJECTIVE
  To test the clinical usefulness of computed radiography (CR) with a storage phosphor plate in upper gastrointestinal radiographic examinations, a newly devised phantom gastric mucosa was used.
  
  
  METHODS
  Simulated small elevated and depressed lesions were created on a phantom gastric mucosa made from a styrofoam "plate". Twenty-four sets of each CR and screen-film radiographs (SR) were obtained using phototimed exposures. Receiver operating characteristic (ROC) study and visual ranking using these images were performed.
  
  
  RESULTS
  There was no significant difference between the ROC curves of CR and SR. By visual ranking, CR was equal to or better than SR in most cases. In no case was SR definitely superior to CR.
  
  
  CONCLUSIONS
  CR can be safely applied to upper gastrointestinal roentgenologic examinations.
authors.affiliation: Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyushi, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Murakami
authors.forename: H
authors.initials: H
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Nakata
mesh_terms: D005753:Gastric Mucosa; D006801:Humans; D019047:Phantoms, Imaging; D013270:Stomach / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*