Digital chest radiography with a large image intensifier: Evaluation of diagnostic performance and patient exposure

L. G. Månsson, S. Kheddache, D. Schlossman, J. Börjesson, E. Håkansson, S. Mattsson, Ulf Tylen

Research output: Contribution to journalArticle

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A digital system for chest radiography based on a large image intensifier was compared with a conventional film-screen system. The diagnostic performance was evaluated with special reference to the digital monitor images with a modified version of receiver operating characteristic (ROC) analysis—free response ROC (FROC) analysis—on a chest equivalent phantom. Measurements of spatial resolution and energy imparted were also performed. The detectability of low-contrast objects as well as spatial resolution was better for the full-size film-screen radiographs than for both the digital monitor images and the 100 mm photofluorograms. The image-intensifier system has a potential for considerable dose savings in relation to the conventional technique provided that fluoroscopy is excluded in the positioning of the patients.

Original languageEnglish (US)
Pages (from-to)337-342
Number of pages6
JournalActa Radiologica
Issue number4
StatePublished - 1989
Externally publishedYes



  • Diagnostic radiology, observer performance
  • patient exposure
  • receiver operating characteristic curve (ROC)
  • spatial resolution
  • thorax, radiography, digital

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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