Does intensity windowing improve the detection of simulated calcifications in dense mammograms?

Journal of Digital Imaging
Etta D PisanoS M Pizer

Abstract

This study attempts to determine whether intensity windowing (IW) improves detection of simulated calcifications in dense mammograms. Clusters of five simulated calcifications were embedded in dense mammograms digitized at 50-microns pixels, 12 bits deep. Film images with no windowing applied were compared with film images with nine different window widths and levels applied. A simulated cluster was embedded in a realistic background of dense breast tissue, with the position of the cluster varied. The key variables involved in each trial included the position of the cluster, contrast level of the cluster, and the IW settings applied to the image. Combining the ten IW conditions, four contrast levels and four quadrant positions gave 160 combinations. The trials were constructed by pairing 160 combinations of key variables with 160 backgrounds. The entire experiment consisted of 800 trials. Twenty student observers were asked to detect the quadrant of the image in which the mass was located. There was a statistically significant improvement in detection performance for clusters of calcifications when the window width was set at 1024 with a level of 3328, and when the window width was set at 1024 with a level of 3456. The selected...Continue Reading

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Citations

Dec 12, 2003·Journal of Digital Imaging·Bradley M Hemminger
Feb 6, 2008·Cancer Imaging : the Official Publication of the International Cancer Imaging Society·K Planche, S Vinnicombe
Apr 15, 2000·Academic Radiology·E D PisanoM P Braeuning
Apr 22, 2009·Medical Physics·Federica ZancaHilde Bosmans

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