MÉTODO DE DETECÇÃO DE CÂNCER EM MAMAS DENSAS UTILIZANDO DIAGNÓSTICO AUXILIADO POR COMPUTADOR

• Autor(a) principal: CAMPOS, Lúcio Flávio de Albuquerque
• Data de Publicação: 2013
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFMA
• Texto Completo: http://tedebc.ufma.br:8080/jspui/handle/tede/65
• topic: Mamograma; Câncer de Mama; Densidade Mamária; Diagnóstico Auxiliado por Computador; Mammogram; Breast Cancer; Breast Density; Computer Aided Diagnosis; CNPQ::ENGENHARIAS::ENGENHARIA BIOMEDICA

Breast Cancer remains the type of cancer with the largest incidence and mortality in women. The best method of prevention is early diagnosis, which is carried out with mammography. However, a mammogram is not effective when the breast has a composition of greater than 50% fibroglandular tissue, or dense tissue. Studies show that high breast density is identified as a risk factor for developing the disease, and because of this new diagnostic technique for cancer in patients with dense breasts are being studied. This thesis proposes a method for early diagnosis of cancer in dense breasts, considered in the literature as hard scanning and detection. The methodology applied in this work used MIAS database for tests, equalization adaptive of histogram and contrast stretching techniques for segmentation step, and independent component analysis maxima-relevance-minimal-redundance and support vector machine for classification step. The tests were carried out with 76 breast mammograms whose dense parenchyma s make detection difficult. From the tests, we obtained accuracy of 97.36% in the segmentation stage. Already in the classification stage was an accuracy of 97.2% with a sensitivity of 81.88% and specificity of 100%. Based on the results, considering that the method was performed only on mammograms difficult to detect, it can be considered that the method achieved excellent performance, justifying the test in larger databases, and eventually enabling their use in hospitals and radiology clinics.