title: Stationary Wavelet Transform and AdaBoost with SVM Based Pathological Brain Detection in MRI Scanning.
abstract: This paper presents an automatic classification system for segregating pathological brain from normal brains in magnetic resonance imaging scanning. The proposed system employs contrast limited adaptive histogram equalization scheme to enhance the diseased region in brain MR images. Two-dimensional stationary wavelet transform is harnessed to extract features from the preprocessed images. The feature vector is constructed using the energy and entropy values, computed from the level- 2 SWT coefficients. Then, the relevant and uncorrelated features are selected using symmetric uncertainty ranking filter. Subsequently, the selected features are given input to the proposed AdaBoost with support vector machine classifier, where SVM is used as the base classifier of AdaBoost algorithm. To validate the proposed system, three standard MR image datasets, Dataset-66, Dataset-160, and Dataset- 255 have been utilized. The 5 runs of k-fold stratified cross validation results indicate the suggested scheme offers better performance than other existing schemes in terms of accuracy and number of features. The proposed system earns ideal classification over Dataset-66 and Dataset-160; whereas, for Dataset- 255, an accuracy of 99.45% is achieved.
authors: Pattern Recognition Research Lab, Department of CSE, NIT, Rourkela 769 008, India.
authors: Deepak Ranjan
authors: DR
authors: Nayak
authors: Ratnakar
authors: R
authors: Dash
authors: Banshidhar
authors: B
authors: Majhi
mesh_terms: D001921:Brain / Q000000981:diagnostic imaging* / Q000473:pathology; D001927:Brain Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D003198:Computer Simulation; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008959:Models, Neurological; D010363:Pattern Recognition, Automated / Q000379:methods; D012680:Sensitivity and Specificity; D060388:Support Vector Machine; D058067:Wavelet Analysis
keywords: AdaBoost with SVM; computer-aided diagnosis; contrast limited adaptive histogram equalization; magnetic resonance
  imaging; stationary wavelet transform