Diagnostic radiologic instrumentation: modulation transfer function
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Noise Sources in Image Intensifying DevicesC
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absorbed Ardran blurring Botden Bouwers camera cent characteristics components contrast transfer function curve density depends detail diagnostic diameter distance dose rate effect electron optical emulsion equation evaluation exposure rate factor field Figure film fluctuation contrast fluorescent screen fluoroscopic focal spot focus frequency response geometric enlargement grid image amplifier image orthicon image quality increase Ingelstam intensifier tube intensifying screens Kuhl layer lens light limit linear luminance magnification means measurements method microdensitometer modulation transfer function Morgan observer optical system output screen parameters perception performance phosphor photocathode photographic photons photoreceptor pickup screen plumbicon problem quantum mottle quantum noise radiation radiographic radiologist radiology resolution retina roentgen Rossmann scatter Schober screen-film systems signal signal-to-noise ratio sine wave spatial frequency square wave statistical techniques television chain test object thickness tion unsharpness vidicon visual system x-ray image intensifier x-ray image tube x-ray quantum