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- W2004243884 abstract "We studied the influence of changes in gain settings, log compression, persistence, preprocessing, and postprocessing on image density in the fetal liver model. Each parameter was studied while the others were held constant. The image density was objectively measured by electrooptical transmission densitometry using a transparent film output. Neither the persistence nor the preprocessing levels significantly changed image density. Postprocessing of sonographic images produced significant differences (p < 0.02) in mean image density of most of the various postprocessing curves and is a serious confounder of tissue echogenicity assessment. The data reconfirmed that there is a linear relationship (r = -0.94 to -0.997) between image density and gain setting. However, each log compression setting significantly changed (p < 0.0000001) this relationship, obviating possible image density calibration. Our data suggest that manipulation of image parameters by computed sonographic technology obviates accurate echogenicity assessment." @default.
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- W2004243884 date "1997-01-01" @default.
- W2004243884 modified "2023-10-16" @default.
- W2004243884 title "Computed Sonography: Requiem to Echogenicity Assessment?" @default.
- W2004243884 doi "https://doi.org/10.1159/000291537" @default.
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