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- W2130140492 abstract "The authors describe a digital filter that greatly enhances the quality of gated cardiac blood-pool images. Spatial filtering is accomplished with a minimum-mean-square-error (Wiener) filter incorporating measured camera blur and Poisson noise statistics. A low-pass temporal filter is then applied to each pixel, with the cutoff frequency determined from measurements of frequency spectra in 20 patients. This filter was evaluated in routine clinical use for nearly one year and found to significantly improve chamber definition, delineate wall motion abnormalities better, and reduce noise. To quantitatively assess the effect of the filter on image interpretation, four experienced observers evaluated wall motion in a series of mathematically simulated left ventricular images. ROC analysis revealed that accuracy in assessing wall motion was significantly greater with the filtered images." @default.
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- W2130140492 date "1984-09-01" @default.
- W2130140492 modified "2023-09-23" @default.
- W2130140492 title "Improved interpretation of gated cardiac images by use of digital filters." @default.
- W2130140492 doi "https://doi.org/10.1148/radiology.152.3.6611565" @default.
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