Hello,
I am hoping to include a covariate in my ANOVA to account for group differences in grey matter volume at the voxel-wise level. Specifically, I used the CAT12 toolbox in SPM to obtain voxel-wise grey matter probability maps for each of my participants and I would like to include these as covariates in my ANOVA (3dMEMA). This way I can control for atrophy in a finer scale versus using the mean GM volumes.
These grey matter probability maps are in a MNI152 space (Template_1_IXI555_MNI152_GS.nii to be exact). I completed my functional pre-processing using the SSwarper (MNI152_2009 template). Would these images be in the same "space" or do I need to convert the grey matter maps into a space that is more similar to SSwarper's template?
Thank you very much,
Tamara