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

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