Hi Matt, Thanks for the link.
Reading on pages 29-31, I am struck by the complexity of the procedure. Not to say that it doesn't work, or that the single T1w image free-surfer stuff is simple :-), on the contrary, it's just that I was expecting to see something about an optimization that used both images, rather than something based on the T1w image followed by an exclusion criterion based on the T2w image. Anyway, works better than without. Minor question on the acquisition of the anatomicals: - Why are you using partial fourier in the read direction? You're throwing away a lot of SNR at the high spatial frequencies, seems a shame to go to 0.7mm and then do that. Cheers, Souheil On May 12, 2013, at 10:54 PM, Matt Glasser <m...@ma-tea.com> wrote: > This is available online now: > > http://authors.elsevier.com/sd/article/S1053811913005053 > > > On 5/7/13 3:10 PM, "Bruce Fischl" <fis...@nmr.mgh.harvard.edu> wrote: > >> actually Matt Glasser points out that a brief description is in his paper >> that is coming out soon, and there is also some description in Andre's >> multi-echo mprage paper >> Bruce >> On Tue, 7 May 2013, Inati, Souheil (NIH/NIMH) [E] >> wrote: >> >>> thanks :-) >>> >>> On May 7, 2013, at 3:28 PM, Bruce Fischl <fis...@nmr.mgh.harvard.edu> >>> wrote: >>> >>>> no, of course not :) >>>> >>>> On Tue, 7 May 2013, Inati, Souheil (NIH/NIMH) [E] >>>> wrote: >>>> >>>>> Hi Bruce, >>>>> >>>>> Out of curiosity and for reference for my users, do you have a paper >>>>> on the T2 or FLAIR assisted segmentation? >>>>> >>>>> Cheers, >>>>> Souheil >>>>> >>>>> ------------------------- >>>>> >>>>> Souheil Inati, PhD >>>>> Staff Scientist >>>>> FMRI Facility >>>>> NIMH/NIH/DHHS >>>>> souheil.in...@nih.gov<mailto:souheil.in...@nih.gov> >>>>> >>>>> >>>>> >>>>> >>>>> On May 7, 2013, at 2:24 PM, Bruce Fischl >>>>> <fis...@nmr.mgh.harvard.edu<mailto:fis...@nmr.mgh.harvard.edu>> wrote: >>>>> >>>>> Hi Katie >>>>> >>>>> I'm really not sure. These days I would recommend a highres (e.g. 1mm >>>>> isotropic) FLAIR if you can get one, or T2 if not. The T2* can help, >>>>> but >>>>> it's pretty noisy in brain. >>>>> >>>>> cheers >>>>> Bruce >>>>> >>>>> On Tue, 7 May 2013, Katie Surrence wrote: >>>>> >>>>> Dear Freesurfer gurus, >>>>> >>>>> At the course, André van der Kouwe mentioned in his morphometry >>>>> methods talk that T2* weighted contrast from >>>>> MEMPRAGE could be used to further seperate dura from cortex, as also >>>>> discussed in this paper: >>>>> http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2408694/. We have a GE >>>>> scanner in our lab. The internet suggests >>>>> that a Multi-echo FSPGR/FGRE exists. Would this be the analog? >>>>> Would it work the same way? Could you also >>>>> use these images with the mris_make_surfaces command? >>>>> >>>>> Thanks very much for your insight -- and I enjoyed the course! >>>>> >>>>> /Katie Surrence >>>>> >>>>> -- >>>>> Research Coordinator >>>>> Social Cognition Laboratory >>>>> New York State Psychiatric Institute >>>>> >>>>> _______________________________________________ >>>>> Freesurfer mailing list >>>>> Freesurfer@nmr.mgh.harvard.edu<mailto: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 >> >> >> 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
