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- W2592841211 abstract "In order to efficiently conduct the anti-aliasing filtering in digital radiography imaging, the oversampling schemeusing an oversampling detector, in which the sampling frequency is higher than that of the desired detector,is considered in this paper. Instead of using difficult analog anti-aliasing filters, digital anti-aliasing filtersare applied to the oversampled data and then their downsampling enables acquiring the desired x-ray images.Supposing an ideal anti-aliasing filtering, the detective quantum efficiency (DQE) performance of the desireddetector can be close to that of the oversampling detector since the overlap of the adjacent noise aliases can beminimized while maintaining the frequency amplitude response for the fundamental frequency range. In thispaper, a 2 x 2 oversampling is conducted for the desired pixel pitch of 152 μm/pixel and various filters aretested for anti-aliasing filtering. It is shown that securing an enough transition band is important to avoid theringing artifacts even though the anti-aliasing performance deteriorates due to the wide transition band. Froman experiment using a CsI(Tl)-based detector, the aliasing artifact problem is alleviated and a DQE improvementof 0.1 is achieved at 2.5 lp/mm from the oversampling radiography imaging over the binning scheme." @default.
- W2592841211 created "2017-03-16" @default.
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- W2592841211 date "2017-03-09" @default.
- W2592841211 modified "2023-09-23" @default.
- W2592841211 title "2x2 oversampling in digital radiography imaging for CsI-based scintillator detectors" @default.
- W2592841211 doi "https://doi.org/10.1117/12.2253874" @default.
- W2592841211 hasPublicationYear "2017" @default.
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