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Proceedings Paper

Evaluation Of Gallbladder Images By Use Of The Radiographic Magnification Technique
Author(s): Kunio Doi; Herwig Imhof
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Paper Abstract

With the radiographs shown i Fig.1, the late Dr. Kurt ossmann used to demonstrate some of the fundamentals of radiologic imaging by means of simple test objects and screen-film systems. The plastic beads simulate low-contrast, round objects such as gall stones. The needle corresponds to a high-contrast, long object such as an °pacified blood vessel. The image on the left is made with a sharp, but noisy system; that on the right is made with an unsharp, less noisy system. The speeds of the two systems are identical. Detail visibility of the needle is better in the system on the left; therefore, detail visibility is sensitive to the resolution or sharpness of the system. The detection of plastic beads, however, is easier on the right and therefore is ilfluenced more by the noise or r.diographic mottle. Although these test objects are very simple, Dr. Rossmann was successful in illustrating not only the effect of these b.sic parameters on the radiographic images, but also the complexities involved in diagnostic radiologic imaging.

Paper Details

Date Published: 27 December 1977
PDF: 7 pages
Proc. SPIE 0127, Application of Optical Instrumentation in Medicine VI, (27 December 1977); doi: 10.1117/12.955908
Show Author Affiliations
Kunio Doi, The University of Chicago (United States)
Herwig Imhof, The University of Chicago (United States)


Published in SPIE Proceedings Vol. 0127:
Application of Optical Instrumentation in Medicine VI
Joel E. Gray; William R. Hendee, Editor(s)

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