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- W2066192941 abstract "In order to assess the quality of an X-ray imager it is necessary to measure the visibility of any artifact that might bepresent in the image. Several methods have been proposed in the literature to calculate this visibility. To predict theperformance of these methods in the context of quality control of X-ray imagers, a base of 10 artifacts as different aspossible in shape and aspect have been created (a pixel, a line, a step, various spots and noises). The amplitude for whicheach artifact has a probability of 50% to be detected has been determined. To do so, the artifacts have been observedmerged with three noises of different spectra (white noise, high-frequency noise and low-frequency noise). Todetermine the 50% detection probability amplitudes, a variant of the 2 Alternative Forced Choice procedure has beenused. It has been checked that the measurement exploitation method is unbiased and its precision is sufficient. Thedispersion of results between testers, around 15% in average, is also satisfactory. These results are a solid and objectivebasis to check the relevance and limits of visibility measurement methods described in literature, applied to the domainof quality control of X-ray imagers." @default.
- W2066192941 created "2016-06-24" @default.
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- W2066192941 date "2011-06-28" @default.
- W2066192941 modified "2023-09-23" @default.
- W2066192941 title "Creation of an artifact database and experimental measurement of their detectability thresholds in noises of different spectra, in the context of quality control of an x-ray imager" @default.
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- W2066192941 doi "https://doi.org/10.1117/12.888838" @default.
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