Detection of breast cancer with improved machine learning algorithms

Breast cancer is the most common cancer type among women worldwide. If breast cancer is detected at an early stage, it can be cured. This study proposes a novel classification model based improved machine learning algorithms for diagnosis of breast cancer. Feature selection and hyperparameter optimization methods are used to build improved the machine learning algorithms. Decision Tree, Naive Bayes, Support Vector Machine, K-Nearest Neighbor and Essemble Learning methods are used as machine learning algorithms, respectively. All experiments are tested on two different datasets, Wisconsin Breast Cancer Dataset (WBCD) and Mammographic Breast Cancer Dataset (MBCD). Relief, Least Absolute Deviation and Least Absolute Shrinkage and Selection Operator (LASSO) and Sequential Forward Selection methods are used to determine the most distinctive features of the datasets, respectively. Bayesian optimization (BO) method is used to find optimal hyperparameters in machine learning algorithms. Within the scope of this study, different experiments are conducted in order to obtain the best classification rate. The proposed feature selection-Bayes optimization hybrid methods have increased the classification rates of the machine learning algorithms used in the study. As a result of the experiments, LASSO-BO-SVM has showed the highest accuracy, precision, recall and F1-score in both datasets (%98,95, %97,17, %100, %98,56 for WBCD; %97.95, %98,28, %98,28, %98,28 for MBCD).