[Freesurfer] GM, WM and CSF segmentation for partial volume correction
Hello list, Following this email that I found in the archives: (...) For the segmentation, FS still works voxelwise, but it's objective is to identify each structure as a whole, whereas SPM and FSL/FAST attempt to classify each voxel as being GM, WM or CSF. A short description of the method in FS is here: http://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferAnalysisPipelineOverview#TheVolume-based.28Subcortical.29Stream You may want also to have a look at this paper: http://dx.doi.org/10.1016/S0896-6273(02)00569-X Hope this helps! All the best, Anderson I need to obtain the different % of tissue (GM, WM and CSF) inside one defined voxel. Does FS has a file that can be exported to Matlab to then get these values? Or only FSL/FAST and SPM have this type of info? Thanks! Andreia ___ 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.
Re: [Freesurfer] GM, WM and CSF segmentation for partial volume correction
Hi Andreia you could certainly change our segmentation labels to just these 3 classes easily enough in matlab. Then we have tools for computing partial volume fractions (I think mri_compute_volume_fractions) cheers Bruce On Wed, 28 Sep 2011, _andre...@sapo.pt wrote: Hello list, Following this email that I found in the archives: (...) For the segmentation, FS still works voxelwise, but it's objective is to identify each structure as a whole, whereas SPM and FSL/FAST attempt to classify each voxel as being GM, WM or CSF. A short description of the method in FS is here: http://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferAnalysisPipelineOverview#TheVolume-based.28Subcortical.29Stream You may want also to have a look at this paper: http://dx.doi.org/10.1016/S0896-6273(02)00569-X Hope this helps! All the best, Anderson I need to obtain the different % of tissue (GM, WM and CSF) inside one defined voxel. Does FS has a file that can be exported to Matlab to then get these values? Or only FSL/FAST and SPM have this type of info? Thanks! Andreia ___ 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.
Re: [Freesurfer] GM, WM and CSF segmentation for partial volume correction
mri_compute_volume_fractions will compute the fractions for each of the tissue types, no need to alter the segmentations. doug Bruce Fischl wrote: Hi Andreia you could certainly change our segmentation labels to just these 3 classes easily enough in matlab. Then we have tools for computing partial volume fractions (I think mri_compute_volume_fractions) cheers Bruce On Wed, 28 Sep 2011, _andre...@sapo.pt wrote: Hello list, Following this email that I found in the archives: (...) For the segmentation, FS still works voxelwise, but it's objective is to identify each structure as a whole, whereas SPM and FSL/FAST attempt to classify each voxel as being GM, WM or CSF. A short description of the method in FS is here: http://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferAnalysisPipelineOverview#TheVolume-based.28Subcortical.29Stream You may want also to have a look at this paper: http://dx.doi.org/10.1016/S0896-6273(02)00569-X Hope this helps! All the best, Anderson I need to obtain the different % of tissue (GM, WM and CSF) inside one defined voxel. Does FS has a file that can be exported to Matlab to then get these values? Or only FSL/FAST and SPM have this type of info? Thanks! Andreia ___ 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 -- 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.
Re: [Freesurfer] GM, WM and CSF segmentation for partial volume correction
Thanks Bruce and Douglas! Andreia Citando Douglas N Greve gr...@nmr.mgh.harvard.edu: mri_compute_volume_fractions will compute the fractions for each of the tissue types, no need to alter the segmentations. doug Bruce Fischl wrote: Hi Andreia you could certainly change our segmentation labels to just these 3 classes easily enough in matlab. Then we have tools for computing partial volume fractions (I think mri_compute_volume_fractions) cheers Bruce On Wed, 28 Sep 2011, _andre...@sapo.pt wrote: Hello list, Following this email that I found in the archives: (...) For the segmentation, FS still works voxelwise, but it's objective is to identify each structure as a whole, whereas SPM and FSL/FAST attempt to classify each voxel as being GM, WM or CSF. A short description of the method in FS is here: http://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferAnalysisPipelineOverview#TheVolume-based.28Subcortical.29Stream You may want also to have a look at this paper: http://dx.doi.org/10.1016/S0896-6273(02)00569-X Hope this helps! All the best, Anderson I need to obtain the different % of tissue (GM, WM and CSF) inside one defined voxel. Does FS has a file that can be exported to Matlab to then get these values? Or only FSL/FAST and SPM have this type of info? Thanks! Andreia ___ 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 -- 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 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
