Hi Chris,

they hypointense WM on the T1 (typically also hyperintense on a T2). Unfortunately they are hard to distinguish from partial voluming on the walls of the ventricle and from the more superior regions of the caudate, unless you hae multispectral data (ideally a FLAIR).

cheers, Bruce

On Tue, 4 Dec 2007, Chris Watson wrote:

What are white matter hypointensities supposed to represent? I'm seeing this segmentation group a lot around the lateral ventricles, caudate, etc.

thanks, Chris _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer