title: Diagnostic accuracy of digitized chest X-rays using consumer-grade color displays for low-cost teleradiology services: a multireader-multicase comparison.
abstract: BACKGROUND
  In teleradiology services and in hospitals, the extensive use of visualization displays requires affordable devices. The purpose of this study was to compare three differently priced displays (a medical-grade grayscale display and two consumer-grade color displays) for image visualization of digitized chest X-rays.
  
  
  METHODS
  The evaluated conditions were interstitial opacities, pneumothorax, and nodules using computed tomography as the gold standard. The comparison was accomplished in terms of receiver operating characteristic (ROC) curves, the diagnostic power measured as the area under ROC curves, accuracy in conditions classification, and main factors affecting accuracy, in a factorial study with 76 cases and six radiologists.
  
  
  RESULTS
  The ROC curves for all of the displays and pathologies had similar shapes and no differences in diagnostic power. The proportion of cases correctly classified for each display was greater than 71.9%. The correctness proportions of the three displays were different (p<0.05) only for interstitial opacities. The evaluation of the main factors affecting these proportions revealed that the display factor was not significant for either nodule size or pneumothorax size (p>0.05).
  
  
  CONCLUSIONS
  Although the image quality variables showed differences in the radiologists' perceptions of the image quality of the three displays, significant differences in the accuracy did not occur. The main effect on the variability of the proportions of correctly classified cases did not come from the display factor. This study confirms previous findings that medical-grade displays could be replaced by consumer-grade color displays with the same image quality.
authors: 1 Department of Electrical and Electronic Engineering, University of Los Andes , Bogotá, Colombia .
authors: Antonio J
authors: AJ
authors: Salazar
authors: Diego A
authors: DA
authors: Aguirre
authors: Juliana
authors: J
authors: Ocampo
authors: Xavier A
authors: XA
authors: Diaz
authors: Juan C
authors: JC
authors: Camacho
mesh_terms: D003626:Data Display / Q000191:economics*; D006801:Humans; D011856:Radiographic Image Enhancement / Q000191:economics / Q000295:instrumentation; D013902:Radiography, Thoracic / Q000191:economics* / Q000295:instrumentation*; D012984:Software; D019112:Teleradiology / Q000191:economics* / Q000295:instrumentation*; D014057:Tomography, X-Ray Computed / Q000191:economics* / Q000295:instrumentation*; D014963:X-Ray Intensifying Screens / Q000191:economics