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Ben Schoepke

Vision REU Week 2. Ben Schoepke. Research. MR physics and terminology Found paper that attempted both tumor and edema segmentation.

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Ben Schoepke

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  1. Vision REU Week 2 Ben Schoepke

  2. Research • MR physics and terminology • Found paper that attempted both tumor and edema segmentation Corso, JJ, Sharon, E., Yuille, A.: Multilevel segmentation and integrated bayesian model classification with an application to brain tumor segmentation. MICCAI 9 (2) (2006) 790-8 T1 T1E T2 FLAIR Ben Schoepke REU Week 2 6/1/07

  3. Experimentation • Obtained MR images from multiple patients Ben Schoepke REU Week 2 6/1/07

  4. Experimentation • Noticed only major difference between T1 and FLAIR was edema T1 FLAIR Ben Schoepke REU Week 2 6/1/07

  5. Experimentation • Initial algorithm: subtract T1 pixels from FLAIR FLAIR T1 Ben Schoepke REU Week 2 6/1/07

  6. Experimentation • Initial algorithm: subtract T1 pixels from FLAIR • Use Otsu’s auto-thresholding method: Flair – T1 image with Otsu threshold applied Result overlayed on FLAIR image Ben Schoepke REU Week 2 6/1/07

  7. Problems Edema not well defined T1 FLAIR - not edema? Ben Schoepke REU Week 2 6/1/07

  8. Establishing ground truth Ben Schoepke REU Week 2 6/1/07

  9. Next week • Start using ITK • Implement mutual information-based image registration Source: Eric and Pinkung’s paper Ben Schoepke REU Week 2 6/1/07

  10. Next week • Experiment with different segmentation techniques Source: ITK documentation Geodesic active contours segmentation Original image Canny-edge level set segmentation Ben Schoepke REU Week 2 6/1/07

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