Direct comparison of conventional and computed radiography with a dual-image recording technique

Radiographics. 1991 Mar;11(2):259-68. doi: 10.1148/radiographics.11.2.2028063.


To compare the image quality of computed radiographic (CR) with conventional screen-film images, the authors used a dual-image recording technique. Images were simultaneously acquired with a conventional screen-film combination and a storage-phosphor imaging plate loaded into a single cassette. Wiener spectra and modulation transfer function were compared for both image types. A preliminary observer performance test was conducted with chest images obtained with the dual-image recording technique on portable and fixed equipment. Analysis of physical parameters and observer test results suggests that the conventional screen-film system can provide slightly superior image quality, although the CR system has some advantage in bedside applications.

Publication types

  • Comparative Study

MeSH terms

  • Confidence Intervals
  • Equipment Design
  • Humans
  • Observer Variation
  • ROC Curve
  • Radiation Dosage
  • Radiographic Image Enhancement / instrumentation
  • Radiographic Image Enhancement / methods*
  • Radiography, Thoracic / instrumentation
  • Radiography, Thoracic / methods
  • Spectrum Analysis
  • Tomography, X-Ray Computed* / instrumentation
  • Tomography, X-Ray Computed* / methods
  • X-Ray Film
  • X-Ray Intensifying Screens*