Digital radiography with photostimulable storage phosphors. Control of detector latitude in chest imaging.

Published

Journal Article

RATIONALE AND OBJECTIVES: A widely used digital radiography system based on a photostimulable storage phosphor (PSP) detector was analyzed with regard to radiographic contrast changes that result from the adjustment of detector latitude (x-ray sensitivity range) in the normal processing of chest images. METHODS: Images of an acrylic step wedge were acquired using the digital system in a mode that permitted direct control of effective detector latitude. The images were post-processed in conditions duplicating those used for portable chest examinations, and contrast was measured. RESULTS: Increases in effective detector latitude provided only marginal radiographic contrast gains in the subdiaphragm-equivalent areas of the laser-printed digital film image, while causing large reductions in radiographic contrast in the lung-equivalent region. CONCLUSION: Detector latitude is an important variable that should be monitored or controlled in investigations that compare reader performance using conventional and digital systems.

Full Text

Duke Authors

Cited Authors

  • Chotas, HG; Ravin, CE

Published Date

  • October 1992

Published In

Volume / Issue

  • 27 / 10

Start / End Page

  • 822 - 828

PubMed ID

  • 1399438

Pubmed Central ID

  • 1399438

International Standard Serial Number (ISSN)

  • 0020-9996

Language

  • eng

Conference Location

  • United States