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- W2006028334 abstract "The presently active standards on Computed Radiography (CR) need a major revision. It was observed by many users that the image quality for class B of EN 14784‐2 is not achievable under the same exposure conditions as used for film exposure. A mathematical model was developed and tested, which allows the calculation of the image quality, proven by image quality indicators (IQI), depending on the fixed pattern noise and the efficiency of the used imaging plate (IP) scanner system. All tested IP scanner systems provide a fixed correlation between the measured signal/noise ratio (SNR) and the grey values in the digital images. The maximum achievable SNRmax depends on the fixed pattern noise of the plate (high dose limit). Depending on the exposure dose an optimum visibility of IQIs can be predicted by calculation and measured considering the attenuation coefficient for calculation of the contrast/noise ratio (CNR). The diameter of the just visible wire is proportional to 1/sqrt(CNR). The optimum tube voltage for best visibility of IQIs and maximum CNR depend on the exposure dose. The optimum tube voltage for best visibility is achieved only at exposures with high dose. A dose dependant optimal tube voltage was not observed for film radiography." @default.
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- W2006028334 date "2011-01-01" @default.
- W2006028334 modified "2023-10-09" @default.
- W2006028334 title "OPTIMUM EXPOSURE CONDITIONS FOR COMPUTED RADIOGRAPHY DEPENDING ON FIXED PATTERN NOISE AND EFFICIENCY OF IMAGING PLATE-SCANNER SYSTEMS" @default.
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- W2006028334 doi "https://doi.org/10.1063/1.3591892" @default.
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