Hi Antonella, > I will appreciate a lot if you can help me understand what is the meaning of > the results after running after running mri_cvs_register and the GLM group > analysis. > > More exactly, I followed all the instructions from the webpage: > > http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Diffusion > > and I wonder if based on the cluster's colours I can say something about my > FA values in one group related to the other one. > > More exactly I am looking to understand if I have an increase in the FA value > for the controls versus patients or the FA in patients is larger than in the > control group. > > My contrast matrix is C = [+1.00000 -1.00000 ] and I have 30 controls and 32 > patients.
I am not sure how to comment on your outcomes as I don't know anything about your data. However, the diffusion tutorial that we put together is a very top-level roadmap on how one might go about voxel-based analysis of their diffusion data. It is not complete in a sense that you would want to make sure that there is some further processing done on your data sets before you start interpreting the results. One is that you would want to introduce a white matter mask that will ensure that you are only considering diffusion values in the white matter and then also you would want to correct for multiple comparison running mri_glmfit-sim. We are planning on updating this tutorial further for our next course to reflect all these additional steps. > What is the age range for the cvs_avg35 space? I wonder if is the best space > to register my subjects if they are children with age between 6-14. The atlas was constructed from 35 adults, consisting of males and females ages 18 to 93. We have been successul registering pediatric images also in that space, but the outcome will also depend on the quality of your images. --Lilla _______________________________________________ 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.
