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Parallel nonlinear analysis of weighted brain's gray and white matter images for Alzheimer's dementia diagnosis

Razavian, S. M. J ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1109/IEMBS.2010.5626791
  3. Publisher: 2010
  4. Abstract:
  5. In this study, we are proposing a novel nonlinear classification approach to discriminate between Alzheimer's Disease (AD) and a control group using T1-weighted and T2- weighted Magnetic Resonance Images (MRI's) of brain. Since T1-weighted images and T2-weighted images have inherent physical differences, obviously each of them has its own particular medical data and hence, we extracted some specific features from each. Then the variations of the relevant eigenvalues of the extracted features were tracked to pick up the most informative ones. The final features were assigned to two parallel systems to be nonlinearly categorized. Considering the fact that AD defects the white and gray regions of brain more than its black and marginal regions, and also since T1-weighted has more medical data of white and gray regions than T2-weighted images, we put optimal weights for the two outputs. Combination of these two results made the final decision of AD diagnosis system. The dataset includes 60 T1-weighted images and 60 T2-weighted images of normal and abnormal cases. The dataset which includes different cross-sections of the brain, after an accurate registration, was split to two groups of test set (40 percent of the dataset) and training set (60 percent of the dataset). The results demonstrate more than two thirds of accuracy in detection of normal and abnormal images
  6. Keywords:
  7. Accurate registration ; Alzheimer's dementia ; Alzheimer's disease ; Control groups ; Data sets ; Diagnosis systems ; Eigenvalues ; Final decision ; Gray region ; Magnetic resonance images ; Medical data ; Nonlinear classification ; Optimal weight ; Parallel system ; Test sets ; Training sets ; White matter ; Diagnosis ; Disease control ; Diseases ; Eigenvalues and eigenfunctions ; Magnetic resonance ; Magnetic resonance imaging ; Nonlinear analysis ; Statistical tests ; Medical imaging
  8. Source: 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10, 31 August 2010 through 4 September 2010, Buenos Aires ; 2010 , Pages 5573-5576 ; 9781424441235 (ISBN)
  9. URL: http://ieeexplore.ieee.org/document/5626791/?reload=true