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2008
Conference Paper
Titel
Contrast sensitivity in mammographic softcopy reading - Determination with psychophysical procedures
Abstract
We introduce a new approach for determining the contrast sensitivity function (CSF) in front of the anatomical noise of mammograms. This permits fundamental investigations on the influence of viewing conditions and image presentation parameters on the perception of contrast. A Gabor pattern and digits are used as target items. The approximation to contrast thresholds is done by a psychophysical staircase procedure and is performed for a selection of spatial frequencies. The results of an observer study with different mammographic cases show, that the approach is applicable independent of the chosen images. For conditions with a duration of at least 3 to 4 minutes the CSF can be determined for a set of spatial frequencies.