Performance of high-resolution monitors for digital chest imaging.


Journal Article

High-resolution cathode-ray tubes (CRT's) are currently the most viable soft-copy display for digital radiography. We present here methods for measuring large-area contrast ratio and detail contrast ratio. A two-dimensional charge coupled device (ccd) array signal-averaged with a video frame buffer permits linear microradiometric measure of individual beam lines. Results from three different 1000-line monitors demonstrate the shift variance of resolution. The detail contrast ratio (or modulation depth) was found to vary from 100% to less than 10% across the face of one CRT. Dynamic focus in both the horizontal and vertical deflection circuitry proved effective in reducing this shift variance. Comparisons of three phosphors demonstrate the utility of long persistence phosphors (P164) for static display in producing brighter images with less flicker. Recommendations for CRT design and selection for high-resolution digital radiography are included.

Full Text

Duke Authors

Cited Authors

  • Suddarth, SA; Johnson, GA; Sherrier, RH; Ravin, CE

Published Date

  • March 1, 1987

Published In

Volume / Issue

  • 14 / 2

Start / End Page

  • 253 - 257

PubMed ID

  • 3587149

Pubmed Central ID

  • 3587149

International Standard Serial Number (ISSN)

  • 0094-2405

Digital Object Identifier (DOI)

  • 10.1118/1.596079


  • eng

Conference Location

  • United States