A survey on computer aided techniques for diagnosing Alzheimer disease

Medical image processing is a fast growing and highly challenging field. Medical imaging Techniques are widely made use of in order to analyse the inner portions of the human body for the medical diagnosis. The Brain disorder such as Alzheimer is considered as a serious life threatening disease. The paper is basically a discussion and a comparative study on the computer aided techniques applied to the brain MRI images for diagnosing Alzheimer disease. The techniques like Principalcomponent-analysis PCA +SVM, Voxel-as-feature VAF +SVM, Non -negative - matrix factorization NMF+SVM and Probabilistic Neural Network-Radial Basis Function are discussed, and their performance, accuracy, specificity and sensitivity measures is evaluated.