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30132 discussions

cortical surface area related measures
by Gregory Kirk 22 Aug '12

22 Aug '12

Hi folks, I wanted to make sure i have everything straight w.r.t. the surface area measures. as i see there are 4 ways implemented ( somewhere ) to do cortical surface area analysis. 1. areal expansion 2. Local Gyrification Index 3. direct vertex based true surface area glm, Winkler AM et. al 4. roi based, i.e. based on the surface areas of the parcellation units in lh.aparc.a2009s.stats etc. 1. recent pub, Lisa T. Eyler et. al used the areal expansion method. was this done exactly as would be achived by using the area tab on qdec and setting up a glm ? Dale published surface area specifying some details of implementation but i was not sure if this was exactly what is implemented in qdec ? 2. LGI seems to me this is the ratio of two areas, that of the hull to the area inscribed by projecting the border of the hull onto the grey/white surface. In an e-mail Nick said LGI is a curvature based measure and that confused me a bit. gyrification is of course related to curvature but it seems the quantities actually calculated here are ratios of areas, which gives local info on surface area differences. 3. the winkler stuff is i think not publicly available yet at this time ? 4. straightforward enough not withstanding ICV corrections, etc. any words of clarification before i start trying some analysis on my group ? thank you Greg

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Re: [Freesurfer] freesurfer license on multi-user cluster (Bruce Fischl)
by Wang, Zheng 21 Aug '12

21 Aug '12

Hi, Bruce, I'm wondering where I can get this system-wide FreeSurfer 5.1 download? Also, is there any manual or instruction for installation on multi-user clusters? Thank you very much! Zheng Wang -----邮件原件----- 发件人: freesurfer-bounces(a)nmr.mgh.harvard.edu [mailto:freesurfer-bounces@nmr.mgh.harvard.edu] 代表 freesurfer-request@nmr. mgh.harvard.edu 发送时间: 2012年8月22日 0:00 收件人: freesurfer(a)nmr.mgh.harvard.edu 主题: Freesurfer Digest, Vol 102, Issue 23 Send Freesurfer mailing list submissions to freesurfer(a)nmr.mgh.harvard.edu To subscribe or unsubscribe via the World Wide Web, visit https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer or, via email, send a message with subject or body 'help' to freesurfer-request(a)nmr.mgh.harvard.edu You can reach the person managing the list at freesurfer-owner(a)nmr.mgh.harvard.edu When replying, please edit your Subject line so it is more specific than "Re: Contents of Freesurfer digest..." Today's Topics: 1. mri_convert introduces flip (Janosch Linkersd?rfer) 2. freesurfer license on multi-user cluster (John Donners) 3. QDEC's clusters and connectivity maps (Antonella Kis) 4. Re: freesurfer license on multi-user cluster (Bruce Fischl) 5. Re: Edits to aparc+aseg.mgz (Sarosh, Cyrus) 6. Convert QDEC clusters on the MNI_152_T1 space (Antonella Kis) ---------------------------------------------------------------------- Message: 1 Date: Tue, 21 Aug 2012 13:42:43 +0200 From: Janosch Linkersd?rfer <notes4januz(a)googlemail.com> Subject: [Freesurfer] mri_convert introduces flip To: freesurfer <freesurfer(a)nmr.mgh.harvard.edu> Message-ID: <BC636725-64B9-4919-B13D-A270261A174F(a)googlemail.com> Content-Type: text/plain; charset="iso-8859-1" Hi experts, I?m trying to convert original images in native space from the LPBA40-Atlas (http://www.loni.ucla.edu/Atlases/LPBA40/) from img/hdr to nii/nii.gz. Conversion always results in a left/right flip. Also, mri_convert complains that no .mat file is available but there are no mat files provided... Here my command and output: mri_convert S01.native.mri.img S01.native.mri.nii.gz $Id: mri_convert.c,v 1.179.2.2 2011/05/16 20:53:47 greve Exp $ reading from S01.native.mri.img... ----------------------------------------------------------------- INFO: could not find /Users/Januz/Downloads/__Tests/__test/S01.native.mri.mat file for direction cosine info. INFO: use Analyze 7.5 hdr->hist.orient value: 0, transverse unflipped (default). INFO: if not valid, please provide the information in /Users/Januz/Downloads/__Tests/__test/S01.native.mri.mat file ----------------------------------------------------------------- TR=0.00, TE=0.00, TI=0.00, flip angle=0.00 i_ras = (-1, 0, 0) j_ras = (0, 1, 0) k_ras = (0, 0, 1) writing to S01.native.mri.nii.gz... Thanks for your help, Janosch

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Convert QDEC clusters on the MNI_152_T1 space
by Antonella Kis 21 Aug '12

21 Aug '12

Dear All, Is possible to overlap my QDEC clusters onto MNI_152_T1 _1mm_brain template? Thank you. Antonella

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bbregister with PET data
by Marco Loggia, PhD 21 Aug '12

21 Aug '12

Hi Doug and Freesurfer team, I am trying to coregister some PET maps with their relative high resolution MEMPRAGE files. I was thinking that bbregister might be my best option but the results are still not satisfactory, likely due to the intrinsic features of my radioligand (the resulting maps are quite 'noisy' in terms of anatomical details). Do you have any suggestions on how to improve the results of bbregister (e.g., flags to use, or preprocessing steps prior to running bbregister)? - the PET map for one subject is here: /autofs/space/katahdin_005/users/marco/PBR28/data/PBR_CLBP001/PET/PBR_CLBP001_average8-28_BET_hdrOK.nii - my SUBJECTS_DIR is here /autofs/space/katahdin_005/users/marco/PBR28/data/ - The command I ran is: bbregister --init-fsl --mov PBR_CLBP001_average8-28_BET_hdrOK.nii --t2 --s PBR_CLBP001 --reg PET2brain.BB.reg --o PET2brain.BB.nii Thanks! Marco ______________________________ Marco L. Loggia, PhD Postdoctoral Fellow Massachusetts General Hospital Brigham and Women's Hospital Harvard Medical School 149 Thirteenth Street, Room 2301 Charlestown, MA 02129 Phone: (617) 643-7267 Fax: (617) 726-7422 marco(a)nmr.mgh.harvard.edu

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GCA file for non-human recon-all use
by Jeff Thompson 21 Aug '12

21 Aug '12

Hello, I have a few questions that I hope can be answered: Q1:How can '.label' files be turned into the necessary '.gca' file needed for the recon-all pipeline. Starting for the first step in auto-recon2.What else other than the '.label' files would be needed to create this '.gca' file? Q2: How to get the seg_edited.mgz file? I would want to use this file in the rebuild_gca_atas.csh script. Q3:Can the rebuild_gca_atlas.csh script be used to make a replacement for the RB_all_2008-03-26.gca file from the average folder? Q4:Is there a way to avoid needing the .gca file if cortical thickness measurements is the only goal?Or could there be a limited number of labels needed incorporated into the .gca file for this goal. Ex. Just Cerebral cortex ROI's. Thank you for any help, Jeff Thompson

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mri_segstats error
by Blazey, Tyler 21 Aug '12

21 Aug '12

Hi, I recently installed the updated mri_segstats (ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/mri_segstats.…) This seems to work fine for recalculating the supratentorial volume. However, it is causing my new recons to fail (see example error below). Any suggestions? Thanks, -Tyler $Id: mri_segstats.c,v 1.86 2012/07/16 14:39:07 greve Exp $ cwd cmdline mri_segstats --id 1 --seg ./tmp.mri_nu_correct.mni.24644/ones.mgz --i ./tmp.mri_nu_correct.mni.24644/nu2.mnc --sum ./tmp.mri_nu_correct.mni.24644/sum.junk --avgwf ./tmp.mri_nu_correct.mni.24644/output.mean.dat sysname Linux hostname login001 machine x86_64 user tblazey UseRobust 0 Loading ./tmp.mri_nu_correct.mni.24644/ones.mgz Loading ./tmp.mri_nu_correct.mni.24644/nu2.mnc Voxel Volume is 1 mm^3 Generating list of segmentation ids Found 1 segmentations Computing statistics for each segmentation 0 1 0 0 Reporting on 0 segmentations Computing spatial average of each frame Writing to ./tmp.mri_nu_correct.mni.24644/output.mean.dat (standard_in) 1: parse error ________________________________ The material in this message is private and may contain Protected Healthcare Information (PHI). If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail.

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Upload the data in virtuell box!
by Fouladi-Movahed, Sarah 21 Aug '12

21 Aug '12

Hello, I don't know how can I upload the DICOM Data in Virtuellbox.I installed the Virtuellbox in windows PC and would like to upload my Image but until now with out any sucsess. Should I install any extra programm to upload any files? Thanks for your Feedback. Best Regards Sarah

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freesurfer license on multi-user cluster
by John Donners 21 Aug '12

21 Aug '12

Dear developers, I just installed freesurfer 5.1.0 system-wide on one of our clusters. All of our users can now access the software, although there is only one license key in the installation directory. Maybe you prefer that every user on our system uses their own license key for your usage statistics? An environment variable FREESURFER_LICENSE could maybe be used for this purpose? Or an additional check for a local license file ~/.freesurfer_license? With regards, John -- John Donners Consultant OSD SARA Science Park 140 1098 XG Amsterdam T +31 (0)20 592 3055 F +31 (0)20 668 3167 M +31 (0)6 1903 9023 E John.Donners(a)sara.nl www.sara.nl

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QDEC's clusters and connectivity maps
by Antonella Kis 21 Aug '12

21 Aug '12

Dear FS team, I am trying to find what is the connection between white matter tracts with reduced FA and a number of cortical regions/clusters with significant reduction in cortical thickness from QDEC. Is there a way to overlap my cortical regions with reduced thickness more exactly the clusters from QDEC on the connectivity maps in FSL. How I create a mask of the QDEC clusters and used them in tractography? The tractography/ connectivity maps has been performed on the MNI standard space. Any suggestion will be greatly appreciated. Antonella

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mri_convert introduces flip
by Janosch Linkersdörfer 21 Aug '12

21 Aug '12

Hi experts, I´m trying to convert original images in native space from the LPBA40-Atlas (http://www.loni.ucla.edu/Atlases/LPBA40/) from img/hdr to nii/nii.gz. Conversion always results in a left/right flip. Also, mri_convert complains that no .mat file is available but there are no mat files provided... Here my command and output: mri_convert S01.native.mri.img S01.native.mri.nii.gz $Id: mri_convert.c,v 1.179.2.2 2011/05/16 20:53:47 greve Exp $ reading from S01.native.mri.img... ----------------------------------------------------------------- INFO: could not find /Users/Januz/Downloads/__Tests/__test/S01.native.mri.mat file for direction cosine info. INFO: use Analyze 7.5 hdr->hist.orient value: 0, transverse unflipped (default). INFO: if not valid, please provide the information in /Users/Januz/Downloads/__Tests/__test/S01.native.mri.mat file ----------------------------------------------------------------- TR=0.00, TE=0.00, TI=0.00, flip angle=0.00 i_ras = (-1, 0, 0) j_ras = (0, 1, 0) k_ras = (0, 0, 1) writing to S01.native.mri.nii.gz... Thanks for your help, Janosch

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