Assuntos
Hemangioma/tratamento farmacológico , Imageamento Tridimensional/instrumentação , Fotografação/instrumentação , Propranolol/administração & dosagem , Neoplasias Cutâneas/tratamento farmacológico , Pele/diagnóstico por imagem , Administração Oral , Estudos de Viabilidade , Feminino , Seguimentos , Hemangioma/diagnóstico , Humanos , Lactente , Masculino , Pele/irrigação sanguínea , Neoplasias Cutâneas/diagnóstico , Resultado do TratamentoRESUMO
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.