Hi Mike, not sure, I'd have to look at it. The code wouldn't work as-is, since it uses the ratio of the echoes to get a rough estimate of T2*.
cheers Bruce On Fri, 8 Oct 2010, Michael Harms wrote: > > Hello, > Deniz mentioned "T2-SPACE" rather than the multi-echo MPRAGE (memprage). > Can you do something similar using the 3D T2-SPACE? > > cheers, > -MH > >> Hi Deniz, >> >> yes, it should be in the mris_make_surfaces of that version. You need to >> run it with -dura memprage_echo%d.mgz 4 >> >> where 4 is the # of echoes, and the names would be memprage_echo0.mgz, >> memprage_echo1.mgz, memprage_echo2.mgz, and memprage_echo3.mgz. These must >> all be "conformed" to be 256^3 and 1mm isotropic, but *not* scaled, >> otherwise the T2* info will be lost by the differential scaling. >> cheers >> bruce >> >> >> On Thu, 7 Oct 2010, Deniz Ozgen wrote: >> >>> Hello All: >>> >>> I read the paper by Kouwe et al. (2008 NeuroImage 40 p.559). >>> >>> I was wondering if FreeSurfer (v4.5) is able utilize the multi echo >>> (especially T2-SPACE) sequence in order achieve better segmentation of >>> GM from dura. The paper mentions the code was altered to do this. >>> >>> If it is possible, is there an additional option or is it able to it >>> by default? I searched the email archive but I couldn't find much >>> information on this topic. >>> >>> Thanks in advance. >>> >>> Deniz Ozgen. >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> >>> >>> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> >> >> The information in this e-mail is intended only for the person to whom it >> is >> addressed. If you believe this e-mail was sent to you in error and the >> e-mail >> contains patient information, please contact the Partners Compliance >> HelpLine at >> http://www.partners.org/complianceline . If the e-mail was sent to you in >> error >> but does not contain patient information, please contact the sender and >> properly >> dispose of the e-mail. >> > > > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
