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Proceedings Paper

X-ray tube voltage dependence of three factors of radiographic mottle for single and double emulsions
Author(s): Hidetaka Arimura; Mitsuhide Okamoto; Takeshi Ikari; Hideaki Kubota; Masao Matsumoto; Atsushi Takigawa; Nobuyuki Nakamori; Hitoshi Kanamori
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Paper Abstract

We have obtained the density or x-ray tube voltage dependence of the Wiener spectra of the three factors of radiographic mottle, i.e., quantum mottle, structure mottle, and film granularity, for the double emulsions of the x-ray film. For the purpose, we proposed a method for obtaining the Wiener spectrum of each of the three factors for the double emulsions. To investigate the relation between the Wiener spectra of the quantum mottle for the double and single emulsions, we compared the Wiener spectra of the quantum mottle for the double emulsions with the sum of those for the front and back emulsions on the same radiographs. The Wiener spectral values of the quantum mottle for the double emulsions at 0 mm-1 were greater than the sums of the Wiener spectral values of the quantum mottle for the front and back emulsions at tube voltages of 50 to 100 kV. We found that this was the result which originated from the following phenomena: (1) the noise-equivalent numbers of quanta (NEQ) of the dual screens were roughly equal to the sum of the NEQ of the front and back screens; (2) the squares of the gradients for the double emulsions were more than four times on an average as great as those for the front and back emulsions.

Paper Details

Date Published: 11 April 1996
PDF: 14 pages
Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); doi: 10.1117/12.237820
Show Author Affiliations
Hidetaka Arimura, Shimadzu Corp. (Japan)
Mitsuhide Okamoto, Kyoto Institute of Technology (Japan)
Takeshi Ikari, Kyoto Institute of Technology (Japan)
Hideaki Kubota, Shiga Univ. (Japan)
Masao Matsumoto, Osaka Univ. (Japan)
Atsushi Takigawa, Hiroshima Prefectural College of Health and Welfare (Japan)
Nobuyuki Nakamori, Kyoto Institute of Technology (Japan)
Hitoshi Kanamori, Kyoto Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 2708:
Medical Imaging 1996: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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