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Variable compensation technique for digital radiography of the chest.

Publication ,  Journal Article
Dobbins, JT; Powell, AO
Published in: Radiology
November 1989

The authors describe a new technique, variable compensation (VC) radiography, for digital radiography of the chest. It permits retrospective adjustment of image display while maintaining improved mediastinal signal-to-noise ratio (S/N) from aggressive x-ray equalization. A fraction of a logarithmic image representing the profile of the beam intensity incident on the patient is subtracted from a logarithmic equalized image. VC images of a chest phantom were generated with various weightings of the beam-profile image. Edge artifacts were substantially reduced with a weighting of greater than 0.5 and eliminated with a weighting of 1.0. The S/N properties of VC images were measured with a series of plastic squares placed over various regions of the chest phantom. The S/N of the squares in the dense sub-diaphragm were improved twofold compared with the S/N on unequalized radiographs, whereas the S/N in the lung was reduced by 30%. Studies of a volunteer revealed the ability to render images with aggressive equalization (for improved mediastinal visualization) and images with the appearance of traditional chest radiographs.

Duke Scholars

Published In

Radiology

DOI

ISSN

0033-8419

Publication Date

November 1989

Volume

173

Issue

2

Start / End Page

451 / 458

Location

United States

Related Subject Headings

  • Radiography, Thoracic
  • Radiographic Image Enhancement
  • Nuclear Medicine & Medical Imaging
  • Models, Structural
  • Mediastinum
  • Humans
  • 3202 Clinical sciences
  • 11 Medical and Health Sciences
 

Citation

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ICMJE
MLA
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Dobbins, J. T., & Powell, A. O. (1989). Variable compensation technique for digital radiography of the chest. Radiology, 173(2), 451–458. https://doi.org/10.1148/radiology.173.2.2798877
Dobbins, J. T., and A. O. Powell. “Variable compensation technique for digital radiography of the chest.Radiology 173, no. 2 (November 1989): 451–58. https://doi.org/10.1148/radiology.173.2.2798877.
Dobbins JT, Powell AO. Variable compensation technique for digital radiography of the chest. Radiology. 1989 Nov;173(2):451–8.
Dobbins, J. T., and A. O. Powell. “Variable compensation technique for digital radiography of the chest.Radiology, vol. 173, no. 2, Nov. 1989, pp. 451–58. Pubmed, doi:10.1148/radiology.173.2.2798877.
Dobbins JT, Powell AO. Variable compensation technique for digital radiography of the chest. Radiology. 1989 Nov;173(2):451–458.
Journal cover image

Published In

Radiology

DOI

ISSN

0033-8419

Publication Date

November 1989

Volume

173

Issue

2

Start / End Page

451 / 458

Location

United States

Related Subject Headings

  • Radiography, Thoracic
  • Radiographic Image Enhancement
  • Nuclear Medicine & Medical Imaging
  • Models, Structural
  • Mediastinum
  • Humans
  • 3202 Clinical sciences
  • 11 Medical and Health Sciences