Hybrid local descriptor for improved detection of masses in mammographic CAD systems
Devi Vijayan, R. Lavanya · International Journal of Advanced Intelligence Paradigms · 2023
Early detection of breast cancer increases the chances of survival considerably. Computer aided detection (CAD) systems are assistive tools which can render cost-effective, quick and objective decision making. The proposed work addresses the development of a CAD system to automatically classify suspicious regions in mammograms as normal and abnormal, aiming to improve the detection of masses. To this end, we propose to fuse two local descriptors, namely SIFT based bag of words (BoW) and uniform local binary pattern (ULBP), using principal component analysis (PCA). The effect of issues including obscured masses, typical of dense breasts, is alleviated by the use of segmentation-devoid local descriptors. Experiments on the benchmark DDSM database with multilayer perceptron (MLP) classification, on features extracted from 4,316 suspicious regions demonstrate the efficiency of proposed system. The obtained result significantly reduces false positives and false negatives, achieving an accuracy of 92.81% with an F1 score of 0.91.