DBP:Harvard:Software:Minutes:5-10-06

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DTI Meeting Minutes | May 10, 2006


Present: CF, Marty, Marc, Mark, Toshiro, KangUk, Doug, Sylvain, Gordon


New Sequence:

  • Nan-kuei will be helping with testing of the new sequence
  • Once sequence is decided, planning on bringing in all previous DTI subjects during month of July
  • Test images
    • 1.7^3 resolution
    • Problem with a missing DWI for one slice--causes major differences in tensor estimation
    • Strange cross-section artifact superimposed on DWI images (doesn't seem to affect FA maps as much)
    • Forebrain appears dimmer than hindbrain
    • Gordon will discuss these issues with Marek and Nan-Kuei


KangUk - White matter atlas coregistration:

  • Both linear and nonlinear coregistration still not that great for a problematic case
  • KangUk will test on a better case; will try to do dual-channel coregistration in AG using FA and Mode
  • Will continue to use scalar maps for coregistration; using structural would add an additional registration step and more error


DTMRI scalar testing:

  • Needs to be an estimation error map in the pipeline; but this is sequence-dependent, so will have not be implemented until new sequence is set