Dear CAT experts,
I performed surface-based morphometry analyses (i.e., estimations of cortical thickness, gyrification, and sulcus depth) using CAT12 and compared cortical thickness maps between two groups. I found significant group differences in some regions. I'd like to use these regions as ROIs to investigate whether there are some correlations between cortical thickness in these regions and participants' cognitive functions. I wonder how to extract cortical thickness values from these ROIs showing group differences.
In case of VBM data, I saved ROIs using 'save-all clusters (binary)' function implemented in SPM12 as image files and then extracted gray matter volumes in ROIs using Marsbar toolbox. However, such procedure didn't work for cortical thickness maps.