When you say tracing an ROI by hand in freeview, did you fill it or just traced the outline? In any case, you will need to do this on each slice by hand. However, there're various options and tools in freeview that may help speed up the process dramatically.

Ruopeng

On 5/16/11 5:12 PM, Lynette Silva wrote:

Hello All,

I think I am missing a key step in creating an ROI in freeview. I have been tracing an ROI by hand in freeview, and saving as a label. Then I use mri_label2vol followed by mri_label_volume, and this works GREAT... except the output has far too few voxels to be the whole volume of my ROI.

How can I select my ROI in three planes in freeview so that I can eventually get a volume output in mm^3? Someone here suggested I trace by hand on every slice in every view, but that can't be the way it's done, is it (please say it isn't)?

Thanks! Lynette