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- W2029804584 abstract "The detective quantum efficiency (DQE) is widely accepted as a primary measure of x-ray detector performancein the scientific community. A standard method for measuring the DQE, based on IEC 62220-1, requires thesystem to have a linear response meaning that the detector output signals are proportional to the incident x-rayexposure. However, many systems have a non-linear response due to characteristics of the detector, or postprocessing of the detector signals, that cannot be disabled and may involve unknown algorithms consideredproprietary by the manufacturer. For these reasons, the DQE has not been considered as a practical candidatefor routine quality assurance testing in a clinical setting. In this article we described a method that can be usedto measure the DQE of both linear and non-linear systems that employ only linear image processing algorithms.The method was validated on a Cesium Iodide based flat panel system that simultaneously stores a raw (linear)and processed (non-linear) image for each exposure. It was found that the resulting DQE was equivalent toa conventional standards-compliant DQE with measurement precision, and the gray-scale inversion and linearedge enhancement did not affect the DQE result. While not IEC 62220-1 compliant, it may be adequate for QAprograms." @default.
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- W2029804584 date "2012-02-23" @default.
- W2029804584 modified "2023-09-27" @default.
- W2029804584 title "A robust approach to measuring the detective quantum efficiency of radiographic detectors in a clinical setting" @default.
- W2029804584 doi "https://doi.org/10.1117/12.912923" @default.
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