TY - GEN
T1 - X-ray tube voltage dependence of detective quantum efficiencies of front and back screens
AU - Arimura, Hidetaka
AU - Ikari, Takeshi
AU - Okamoto, Mitsuhide
AU - Kubota, Hideaki
AU - Matsumoto, Masao
AU - Takigawa, Atsushi
AU - Nakamori, Nobuyuki
AU - Kanamori, Hitoshi
PY - 1995
Y1 - 1995
N2 - By separating the Wiener spectra of screen mottle of a medical screen/film system for various tube voltages into those of quantum mottle and structure mottle, we experimentally determined the tube voltage dependence of the detective quantum efficiencies (DQEs) of the front of back screens. For the purpose, using the DQE, the equation of the Wiener spectrum of the quantum mottle has been expressed, and using the equation, our method for separating the Wiener spectra of the screen mottle was modified. Both the DQEs of the front and back screens decreased with tube voltage. The DQE of the front screen at each tube voltage was greater than that of the back screen. We explained the tube voltage dependence of the DQEs using the dependence of the first and second moments of absorbed x-ray energy distribution in the screen obtained using our data of incident x-ray spectra for various tube voltages and Swank's noise-equivalent absorption spectra.
AB - By separating the Wiener spectra of screen mottle of a medical screen/film system for various tube voltages into those of quantum mottle and structure mottle, we experimentally determined the tube voltage dependence of the detective quantum efficiencies (DQEs) of the front of back screens. For the purpose, using the DQE, the equation of the Wiener spectrum of the quantum mottle has been expressed, and using the equation, our method for separating the Wiener spectra of the screen mottle was modified. Both the DQEs of the front and back screens decreased with tube voltage. The DQE of the front screen at each tube voltage was greater than that of the back screen. We explained the tube voltage dependence of the DQEs using the dependence of the first and second moments of absorbed x-ray energy distribution in the screen obtained using our data of incident x-ray spectra for various tube voltages and Swank's noise-equivalent absorption spectra.
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U2 - 10.1117/12.211900
DO - 10.1117/12.211900
M3 - Conference contribution
AN - SCOPUS:0029226447
SN - 0819418781
SN - 9780819418784
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 12
EP - 23
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - Society of Photo-Optical Instrumentation Engineers
T2 - X-Ray and Ultraviolet Sensors and Applications
Y2 - 13 July 1995 through 14 July 1995
ER -