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American Journal of Roentgenology, Vol 103, 681-688, Copyright © 1968 by American Roentgen Ray Society

BEAM QUALITY MEASUREMENTS IN DIAGNOSTIC ROENTGENOLOGY

E. DALE TROUT B.S., D.Sc.1, JOHN P. KELLEY B.S.1, and RICHARD E. GROSS B.S.1

1 From the X-Ray Science and Engineering Laboratory, Oregon State University, Corvallis, Oregon

Our work to date indicates that the 20th value layer in either aluminum or unit density material can, for one anatomic area of fixed section thickness, be used to predict exposures over a range of kilovoltages

[See Figure in the PDF File]

using a single type of roentgen-ray unit. Our continuing investigation will look into whether or not other parts and section thicknesses and roentgen-ray equipment of other types will respond to similar treatment. It is our hope that the 20th value will reflect beam characteristics in such a manner as to be applicable to any roentgen-ray unit.


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