Automated detection of breast tumors using the asymmetry approach
Computers and Biomedical Research
A Novel Approach for Breast Skin-Line Estimation in Mammograms
CBMS '05 Proceedings of the 18th IEEE Symposium on Computer-Based Medical Systems
IEEE Transactions on Image Processing
Localizing Region-Based Active Contours
IEEE Transactions on Image Processing
Proceedings of the 50th Annual Southeast Regional Conference
Proceedings of the International Conference on Advances in Computing, Communications and Informatics
Estimation of the breast skin-line in mammograms using multidirectional Gabor filters
Computers in Biology and Medicine
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In this work, we present a novel region-based active contour technique to extract the breast boundary in mammograms. Skinline extraction in mammograms is non-trivial due to the presence of noise, intensity inhomogeneities, and scanning artifacts. Also, weak contrast near the skin-line boundary, especially in the case of low-density breasts, poses a lot of difficulty in its extraction. Here, we represent the breast boundary by a smooth, parametric curve. The region based data term of the active contour energy is based on the assumption that in a small neighborhood around the skin boundary, the intensity is piece-wise constant. Further, to achieve a good initial guess, we make use of the assumption that at a large scale, the breast image is binary with a fuzzy boundary. A PDE based energy is employed to get the fuzzy membership function. The smoothness term of the above energy allows us to handle noise/ scanning artifacts in mammograms, and allows easy extraction of a single contour, which is then input to the active contour energy. Our experiments on the MIAS database gave promising results as validated by an experienced radiologist.