Optimizing The Digital Radiographic Image By Means Of A Dynamic Phantom And Animal Studies

P. T. Cahill; R.J. R. Knowles; B.C. P. Lee; S. Saddekni; B. Kneeland; M. Peterson

doi:10.1117/12.934708

1 November 1982 Optimizing The Digital Radiographic Image By Means Of A Dynamic Phantom And Animal Studies

P. T. Cahill, R.J. R. Knowles, B.C. P. Lee, S. Saddekni, B. Kneeland, M. Peterson

Proceedings Volume 0375, Medical Imaging and Image Interpretation; (1982) https://doi.org/10.1117/12.934708
Event: 1st International Symposium on Medical Imaging and Image Interpretation, 1982, Berlin, Germany

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.

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P. T. Cahill, R.J. R. Knowles, B.C. P. Lee, S. Saddekni, B. Kneeland, and M. Peterson "Optimizing The Digital Radiographic Image By Means Of A Dynamic Phantom And Animal Studies", Proc. SPIE 0375, Medical Imaging and Image Interpretation, (1 November 1982); https://doi.org/10.1117/12.934708

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