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Radiology, Vol 144, 619-622, Copyright © 1982 by Radiological Society of North America

ARTICLES

The energy-dependent behavior of noise Wiener spectra in their low- frequency limits: comparison with simple theory

CJ Vyborny, LN Loo and K Doi

The Wiener spectra of five screen-film systems were studied as a function of monoenergetic x-ray energy. These spectra, in their low- frequency limits, were seen to depend linearly on x-ray energy. The Wiener spectra also decreased in magnitude as the incident x-ray energy exceeded that of the screen phosphor K absorption edge. The agreement of these experimental findings with simple theoretical predictions is discussed.




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