Variable compensation chest radiography performed with a computed radiography system: design considerations and initial clinical experience.

Journal Article (Journal Article)

The authors describe a variable compensation (VC) technique in which an x-ray equalizer and a computed radiography system are used. The VC technique allows retrospective alteration of equalized chest appearance with maintenance of improved signal-to-noise ratio in dense regions. Two imaging plates are used: one upstream of the patient to record the incident beam profile and one down-stream to record the equalized image. Subtraction of a weighted version of the upstream image from the down-stream image permits alteration of the appearance of the VC image, from the extremes of stimulated-unequalized to highly equalized. VC image appearance was optimized with a real-time workstation. The quality of VC images obtained in 33 patients was evaluated by three chest radiologists. Mediastinal appearance was better on VC equalized images than on conventional screen-film images. The stimulation of the appearance of a conventional radiograph with VC proved useful in interpretation of lung appearances on equalized radiographs.

Full Text

Duke Authors

Cited Authors

  • Dobbins, JT; Rice, JJ; Goodman, PC; Patz, EF; Ravin, CE

Published Date

  • April 1993

Published In

Volume / Issue

  • 187 / 1

Start / End Page

  • 55 - 63

PubMed ID

  • 8451437

International Standard Serial Number (ISSN)

  • 0033-8419

Digital Object Identifier (DOI)

  • 10.1148/radiology.187.1.8451437


  • eng

Conference Location

  • United States