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Radiology, Vol 128, 820-821, Copyright © 1978 by Radiological Society of North America

ARTICLES

Step-wedge sensitometry

J Hale and P Bloch

An aluminum step-wedge filter placed far from the film cassette provides the constant variation of subject contrast required for quantitative sensitometry while virtually eliminating scatter radiations. Attenuation curves made with this configuration are almost exponentially linear.




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Copyright © 1978 by the Radiological Society of North America.