Hi Andreia, I've done this before using information in the spectroscopy header, then synthesizing an MRI "volume" with one voxel that covers the size of your spectroscopy voxel, then registering that to the FS anatomical, then computing the partial volume fractions from the anatomical. The hard part is the first step, which I can't really advise you on.
doug _andre...@sapo.pt wrote: > Dear list, > > I am performing single-voxel and multivoxel spectroscopy analysis and > I need to do partial volume correction. I found a thread on the list > of someone asking if it possible to achieve this using Freesurfer (see > below), but there is no answer saying how it is done. My question is > how can I define the voxel (for single-voxel) and the chosen voxels > (for multivoxel) in the anatomical data set to use the segmentation of > only that defined voxel? I'm using a Siemens TrioTim 3T. All > acquisitions are in the same session. The anatomical dataset is an > average of 2 MPRAGEs which I've already processed using FS, and the > spectra files are .rda. The header of the MRS data has info on > vectors, but I don't know how to use them. > > > > "Re: [Freesurfer] need info for beginner > > Bruce Fischl > Thu, 26 Apr 2007 11:17:01 -0700 > > Hi Pom, > > yes, people here are using it for spectroscopy and for partial volume > correction (also for voxel placement). > > cheers, > Bruce > > On Thu, 26 Apr 2007 [EMAIL PROTECTED] wrote: > > Hi, > > I am about to install FREE SURFER for my Spectroscopy work. > I want to use the software to perform GM/WM segmentation on my > single voxel data sets. > > I am wondering if any one on this mailing list is currently > doing this task. I would like to get comments. > > My study is on a GE 3T scanner. > > thank you, > > Pom" > > > > Any advice, please? > > Thank you! > > Andreia > > > -- > > Andreia Pereira, MSc student > Visual Neuroscience Laboratory > IBILI-Faculdade de Medicina > Azinhaga de Santa Comba > 3000-354 Coimbra Portugal > Phone +(351) 239480220 > Fax +(351) 239480280 > > ------------------------------------------------------------------------ > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ 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.
