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Neural Network Based Brain Tumor Detection using MR Images

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Neural Network Based Brain Tumor Detection using MR Images

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Neural Network Based Brain Tumor Detection using MR Images

  1. 1. NEURAL NETWORK BASED BRAIN TUMOR DETECTION USING MR IMAGES Presented by: Aisha Kalsoom 10/17/2015 1
  2. 2. OUTLINE  Brain Tumors  Imaging Techniques  Artificial Neural Network in detection of Brain Tumor  Hopfield Neural Network  Multiparameter feature block  Markov Random Field Segmentation  Adaptive Spatial Fuzzy Clustering Algorithm  Multiparameter MRI Analysis  Active Contour Model  Scheme of Proposed Research Work 10/17/2015 2
  3. 3. BRAIN TUMORS  “Unstrained growth in the brain.”  Benign Tumors  Non cancerous Tumors  Malignant Tumors  Cancerous Tumors  Primary Tumors  Starting in brain  Non Spreading to other parts  Secondary Tumors  Spreading to other parts 10/17/2015 3
  4. 4. IMAGING TECHNIQUES  X-Ray  Computed Tomography-CT Scan  Positron Emission Tomography-PET  Magneto Encephalography-MEG  Biopsy  Magnetic Resonance Imaging-MRI 10/17/2015 4
  5. 5. MAGNETIC RESONANCE IMAGING-MRI  An imaging technique based on the measurement of magnetic field vectors generated after an excitation with strong magnetic fields and radiofrequency pulses in the nuclei of hydrogen atoms present in water molecules of a patient’s tissue.  MRI , an appropriate technique to detect the tumors in brain automatically. 10/17/2015 5
  6. 6. HOPFIELD NEURAL NETWORK  In 1997, Scientists presented work on Computerized Tumor Boundary Detection using a Hopfield Neural Network.  A new approach for detection of brain boundaries in medical images.  Solution to optimization problem.  Implementation for real time processing. 10/17/2015 6
  7. 7. AUTOMATED SEGMENTATION AND CLASSIFICATION  A fully automated process.  Based on a Kohonen self organizing neural network.  Uses the standard T1-, T2- and PD-weighted MR Images acquired in clinical examinations.  Produces reliable and reproducible MR images segmentation and classification.  Eliminates intra and inter observer variability. 10/17/2015 7
  8. 8. MUTIPARAMETER FEATURE BLOCK  The detection and visualization of brain tumors on T2-weighted MR images using multiparameter feature block.  An analytical method to detect lesions or tumors in digitized medical images for 3D visualization.  Comparison of feature blocks with standardized parameters.  Experiments based on single and multiple slices of the MRI dataset. 10/17/2015 8
  9. 9. MRF SEGMENTATION OF BRAIN MRI  Markov Random Field Segmentation.  A fully automatic 3D segmentation of Brain MRI.  Analysis is performed on:  The impact of noise  Inhomogeneity  Smoothing and structure thickness  Segmentation algorithm captures three features:  Nonparametric Distributions of tissues intensities  Neighborhood correlations  Signal inhomogeneities 10/17/2015 9
  10. 10. ADAPTIVE SPATIAL FUZZY CLUSTERING ALGORITHM  The input images may be corrupted by noise and INU.  The local spatial continuity constraint reduces the noise effect and the classification ambiguity.  Multiplicative bias field 10/17/2015 10
  11. 11. SEGMENTATION USING 3D FEATURE SET  Variation brain tumor segmentation algorithm.  Automation of manually Tumor segmentation.  Make use of prior information about the appearance of normal brain.  Using manually segmented data statistical model is obtained.  Use of conditional model for discrimination between normal and abnormal regions. 10/17/2015 11
  12. 12. MULTI PARAMETER MRI IMAGE ANALYSIS  This method does not require any initialization.  Firstly, area of tumor of single slice of MRI data set is calculated.  Secondly, the volume of the tumor from multiple image MRI set is calculated.  Provide facility and Improves followings:  Brain tumor shape approximation  2D visualization  3D visualization for surgical planning  Access to tumors 10/17/2015 12
  13. 13. SCHEME OF PROPOSED RESEARCH WORK  Preprocessing of MRI.  Image Acquisition  Adaptive filters  Image Analysis of MRI.  Segmentation  Feature Extraction  Enhancement 10/17/2015 13
  14. 14. Image To MATLAB Adaptive FiltersImage Acquisition Segmentation Enhancement Results ANN Detection Feature Extraction 10/17/2015 14
  15. 15. CONCLUSION  Different techniques and methods of ANN provide ease and facility for the detection, classification, segmentation and visualization of brain tumors. ANN plays important role in the treatment of Brain tumors. References:  International Journal of Computer Science and communication Vol. 2, No. 2, July-December 2011,pp. 325- 331  Neural Network Based Tumor Detection using MRI 10/17/2015 15

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