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American Journal of Roentgenology, Vol 148, Issue 3, 569-573
Copyright © 1987 by American Roentgen Ray Society

Articles

Direct radiographic magnification with computed radiography

Y Nakano, T Hiraoka, K Togashi, K Nishimura, K Itoh, I Fujisawa, T Sagoh, S Minami, H Itoh, and K Torizuka

Computed radiography was combined with a 0.1-mm microfocus radiographic tube to obtain radiographic magnification of a x3 to x5. Gray-scale image processing compensated for the loss of radiographic contrast associated with the high-kilovoltage, short-exposure technique. The high-pass spatial frequency filtering capability of the computed radiography resulted in enhanced edges and increased displayed latitude. The improved image quality obtained by magnification computed radiography allowed delineation of subtle abnormalities and small anatomic structures not apparent on conventional screen-film contact or magnification radiographs.
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