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Site Differences in Kspace Filtering and How They Explain Site Differences in Image Smoothness

Site Differences in Kspace Filtering and How They Explain Site Differences in Image Smoothness. Lee Friedman, Ph.D. The MIND Institute FIRST BIRN All Hands Meeting March 21, 2005. Site Differences in Sensitivity. Site Differences in Smoothness. Smoothness Predicts Sensitivity.

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Site Differences in Kspace Filtering and How They Explain Site Differences in Image Smoothness

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  1. Site Differences in Kspace Filtering and How They Explain Site Differences in Image Smoothness Lee Friedman, Ph.D. The MIND Institute FIRST BIRN All Hands Meeting March 21, 2005

  2. Site Differences in Sensitivity

  3. Site Differences in Smoothness

  4. Smoothness Predicts Sensitivity

  5. http://www.revisemri.com/tutorials/intro_kspace1.htm Dave Higgins Google: kspace mri tutorial

  6. Broader PSF More Smooth Image Less Noisy Image More Sensitive to BOLD Narrow PSF Less Smooth Image More Noisy Image Less Sensitive to BOLD The Voxel Point Spread Function

  7. gary

  8. IOWA GE 1.5T STAN 3T, DUKE 1.5T, DUKE 4.0T all GE IRVINE PICKER 1.5T ALL SIEMENS, BRIGHAM GE 3T

  9. SPIRAL EPI

  10. STAN 3T, DUKE 1.5T, DUKE 4.0T IOWA GE 1.5T IRVINE PICKER 1.5T

  11. Recommendations for Multi-Center Studies All sites use same kspace filtering regimes Easy to implement Higher Spatial Resolution Less Smooth More Noisy Less Sensitive Ugly Voxel PSF No Kspace Filters gary Hard to implement Lower Spatial Resolution More Smooth Less Noisy More Sensitive Pretty Voxel PSF Rotationally Symmetric Fermi Filter Radius = 32 Width = 2.5

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