| Variable compensation technique for digital radiography of the chest. | |
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MedLine Citation:
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PMID: 2798877 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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J T Dobbins; A O Powell |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Radiology Volume: 173 ISSN: 0033-8419 ISO Abbreviation: Radiology Publication Date: 1989 Nov |
Date Detail:
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Created Date: 1989-11-14 Completed Date: 1989-11-14 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0401260 Medline TA: Radiology Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 451-8 Citation Subset: AIM; IM |
Affiliation:
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Department of Radiology, Duke University Medical Center, Durham, NC 27710. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Humans Mediastinum / radiography Models, Structural Radiographic Image Enhancement / methods* Radiography, Thoracic / methods* |
| Grant Support | |
ID/Acronym/Agency:
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1S10-RR04056-01/RR/NCRR NIH HHS; 5R23-CA43854-02/CA/NCI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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