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Spatially based application of the minimum cross-entropy thresholding algorithm to segment the pectoral muscle in mammograms
Conference paper   Open access

Spatially based application of the minimum cross-entropy thresholding algorithm to segment the pectoral muscle in mammograms

M. Masek, R. Chandrasekhar, C.J.S. de Silver and Y. Attikiouzel
IEEE
Seventh Australian and New Zealand Intelligent Information Systems Conference (Perth, Western Australia, 18/11/2001–21/11/2001)
2001
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Abstract

A threshold-based algorithm is presented for the extraction of the pectoral muscle edge in mediolateral oblique view mammograms. The minimum cross-entropy thresholding algorithm is applied to local areas around the pectoral muscle to determine a series of thresholds as a function of area size. Using a model image it is shown that art inflection point in this function corresponds to a threshold that will separate the pectoral muscle from the rest of the breast. Post processing is performed on mammograms to eliminate false positive points of inflection and a straight line is fitted to the detected pectoral boundary in order to smooth jaggedness caused by the non-uniform intensity of the pectoral muscle edge.

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