DBP:Harvard:Software:Minutes:5-3-06

DTI Meeting Minutes | May 3, 2006

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

Scanning

• Marek is continuing to test out the new sequence
• New rule that a licensed MD must request MRI even if for research
• Problem with reconstruction with multiple b-value images; causing FA to decrease significantly
• At the scanner, unable to arbitrarily decide the number of baseline images; Marek will try to manually change whatever parameter this is
• Can get resolution of scans down to 1.5x1.5x1.5, but this may increase noise in the images

Tensor Registration

• Goal of this is coregistration of segmented white matter labelmaps with our data
• In test of new tensor registration module from Mattan, linear registration is working better than nonlinear, which is way off
• KangUk will test this with scans of the same resolution
• This registration is done at scalar level, and is not actually using the tensors; we can try the same thing using AG and multiple scalar maps
• Marc will try to troubleshoot this on Friday

Anterior Commissure, Mode/FA histograms

• Gordon has sent scripts for creating AC boundary maps
• Gordon has sent script for generating histograms; will continue to work on this using labelmaps PNL sends to him.