Hi Steve

it's hard to tell from a single slice. You can disable the wmsa labeling by giving mri_ca_label the switch -nowmsa

cheers Bruce On Tue, 1 May 2012, Steven Korycinski wrote:

To all,

I've been using aseg.stats to gather volumetric data about size of the left caudate for a group of subjects. For one subject in particular, there's a large purple-colored area labeled "WM-hypointensities" near the left caudate in aseg.mgz (see attached image) that looks to me like it should be labeled caudate instead (though I'll admit, I'm not an expert in neuroanatomy). I know that aseg.mgz is used in generating the statistics in aseg.stats, so I'm concerned that if I am correct the statistics I've been using are not accurate.

Can anyone help me understand what these "WM-hypointensities" are and why there seems to be a large area labeled as such for this particular subject? Am I correct in assuming that an error of some kind may have occurred, and that this area should actually be labeled as caudate?

Thanks, -Steve