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28 August 1984 Effects Of The CT Display Window On Detectability Of Large And Small Lesions
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The effects of CT display window width and lesion size on observer performance were studied by measurements of contrast-detail "thresholds" and lesion detectability (using ROC analysis). Both methods of measuring observers' perceptual performance showed that lesions became less visible as the width of the display window increased, and that the magnitude of this effect was greater for larger (lower contrast) lesions than for smaller ( higher contrast) lesions. Manipulations of the CT display window did not affect the information content of the physical image, as measured by actual calculations of signal-to-noise ratio for a "lesion-matched" filter. Therefore, the effects of display window on observer performance were attributed to psychophysical properties of the human visual system.
© (1984) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dana A. Twible, Philip F. Judy, and Richard G. Swensson "Effects Of The CT Display Window On Detectability Of Large And Small Lesions", Proc. SPIE 0486, Medical Imaging and Instrumentation '84, (28 August 1984);

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