[Freesurfer] TRACULA - tract volume and length
Dear DTI experts, I am trying to understand how to interpret tract length volume measurements that TRACULA provides. For example, let’s say a clinical population differs from a control group in mean FA of a particular tract, and tract length volume are comparable across the 2 groups. I think this would support the notion that the tract’s diffusion properties are indeed different across the two groups and that the FA finding are unlikely to be an artifact of probabilistic tractography. Is this a correct interpretation? Conversely, if group differences in tract volumes were detected, would you recommend comparing mean FA across the two group while covarying for tract volume? Thanks! ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
[Freesurfer] surface morphology
Hi All, Is there an approach within freesurfer (or related software) for examining surface morphology of subcortical structures? WIth freesurfer I'm able to examine the total volume of various subcortical structures, but if my participants differ in volume of a subcortical structure, I can't determine where in that structure the difference is located. I'd love to do a surface analysis of these structures, similar to what's done with the cortical surface. Is this possible? Thanks! ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
[Freesurfer] subcortical gray matter volumes
Hi All, Two questions: 1. I am interested in subcortical gray matter volumes such as hippocampus, amygdala, basal ganglia. Can someone recommend some good references looking at the accuracy of Freesurfer relative to the gold standard approach of hand-tracing these structures? 2. Most of the problems that require quality checks for Freesurfer relate to defining the cortical surface and the grey-white boundary. As far as I can tell, there is rarely a need to edit Freesurfer's definitions of subcortical gray. Am I correct in this? Thanks! Fred ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
