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Proceedings Paper

Optimizing The Digital Radiographic Image By Means Of A Dynamic Phantom And Animal Studies
Author(s): P. T. Cahill; R.J. R. Knowles; B.C. P. Lee; S. Saddekni; B. Kneeland; M. Peterson
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Paper Abstract

The quality of digital radiographic images cannot be judged subjectively by visual inspection, nor by the currently available static phantoms used for conventional radiographic equipment. In this study, a quasistatic phantom was developed to maximize the mapping of contrast differences into available gray levels while obtaining maximum resolution. Flow patterns were evaluated in dynamic phantoms of varying rigidity and in canine arteries, by a series of pulsed contrast bolus injections at various flow rates. The effect of stenoses in the phantoms and canine vessels on the flow pattern were also studied. Our results indicate that it is possible to determine the velocity of flow by these methods, and that the inherent elastic properties of the flexible phantom and arteries rather than the degree of stenoses is responsible for modification of the flow pattern.

Paper Details

Date Published: 1 November 1982
PDF: 3 pages
Proc. SPIE 0375, Medical Imaging and Image Interpretation, (1 November 1982); doi: 10.1117/12.934708
Show Author Affiliations
P. T. Cahill, The New York Hospital-Cornell Medical Center (United States)
R.J. R. Knowles, The New York Hospital-Cornell Medical Center (United States)
B.C. P. Lee, The New York Hospital-Cornell Medical Center (United States)
S. Saddekni, The New York Hospital-Cornell Medical Center (United States)
B. Kneeland, The New York Hospital-Cornell Medical Center (United States)
M. Peterson, The New York Hospital-Cornell Medical Center (United States)


Published in SPIE Proceedings Vol. 0375:
Medical Imaging and Image Interpretation
Judith M. S. Prewitt, Editor(s)

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