Comput. Biol. Med. - Estimation of the breast skin-line in mammograms using multidirectional Gabor filters.

Tópicos

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Resumo

Segmentation of the breast region is a fundamental step in any system for computerized analysis of mammograms. In this work, we propose a novel procedure for the estimation of the breast skin-line based upon multidirectional Gabor filtering. The method includes an adaptive values-of-interest (VOI) transformation, extraction of the skin-air ribbon by Otsu's thresholding method and the Euclidean distance transform, Gabor filtering with 18 real kernels, and a step for suppression of false edge points using the magnitude and phase responses of the filters. On a test set of 361 images from different acquisition modalities (screen-film and full-field digital mammograms), the average Hausdorff and polyline distances obtained were 2.85 mm and 0.84 mm, respectively, with reference to the ground-truth boundaries provided by an expert radiologist. When compared with the results obtained by other state-of-the-art methods on the same set of images and with respect to the same ground-truth boundaries, our method mostly outperformed the other approaches. The results demonstrate the effectiveness and robustness of the proposed algorithm.

Resumo Limpo

segment breast region fundament step system computer analysi mammogram work propos novel procedur estim breast skinlin base upon multidirect gabor filter method includ adapt valuesofinterest voi transform extract skinair ribbon otsus threshold method euclidean distanc transform gabor filter real kernel step suppress fals edg point use magnitud phase respons filter test set imag differ acquisit modal screenfilm fullfield digit mammogram averag hausdorff polylin distanc obtain mm mm respect refer groundtruth boundari provid expert radiologist compar result obtain stateoftheart method set imag respect groundtruth boundari method most outperform approach result demonstr effect robust propos algorithm

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