Freesurfer

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30088 discussions

BrainHack Donostia 2nd edition, 5-8 May 2019, San Sebastian
by Stefano Moia 26 Mar '19

26 Mar '19

External Email - Use Caution Dear all, At the Basque Center on Cognition, Brain and Language (BCBL), we are organizing the second edition of Brainhack Donostia ( https://brainhackdonostia.pages.bcbl.eu ), an event focused on neuroimaging and the promotion of open-source resources in an accessible way across disciplines and experience levels. This edition will take place on May 5 -8 at BCBL, where two invited speakers (Prof. Dimitri Van De Ville, EPFL, and Matteo Bastiani, University of Nottingham) and other scientists from BCBL will give talks and develop hands-on tutorials on data handling from several neuroimaging techniques. In particular, we will cover three techniques: Diffusion-Weighted Imaging (DWI), Magnetoencephalography (MEG) and functional Magnetic Resonance Imaging (fMRI). To know more about it, you can c heck the schedule here: https://brainhackdonostia.pages.bcbl.eu/sites/timeline.html We are also going to host a hackaton in parallel, in which the attendants will propose and collaborate on neuroimaging-related projects (e.g., data acquisition, visualization, etc.). Check the project page for more info: https://brainhackdonostia.pages.bcbl.eu/sites/projects.html We encourage you to come and enjoy such an experience with us! Feel free to register here https://brainhackdonostia.pages.bcbl.eu/sites/register.html For any inquiries, please email us at info.bhg-donostia(a)bcbl.eu We hope to see you in May! Stefano Moia --- PhD student @ BCBL www.bcbl.eu Tel: +34 943 309 300 Legal disclaimer/Aviso legal/Lege-oharra: www.bcbl.eu/legal-disclaimer

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Re: [Freesurfer] mris_fix_topology stuck running
by Soichi Hayashi 26 Mar '19

26 Mar '19

External Email - Use Caution Bruce, Thank you for your help. I'd very much appreciate it. I've looked at rh.orig.nofix / rh.inflated.nofix, but I couldn't really find anything out of ordinary.. from my layman's eyes. [image: Screenshot from 2019-03-26 10-35-42.png] Could you point me to the wiki you mentioned? Soichi On Sun, Mar 24, 2019 at 4:37 PM Bruce Fischl <fischl(a)nmr.mgh.harvard.edu> wrote: > Hi Soichi > > that is too big a defect to expect it to fix - more than half the number > of vertices in a typical hemisphere. It means something is badly wrong > that you need to correct prior to the topo fixer. You can look at our > wiki for this kind of thing, but I would start by looking at the > rh.orig.nofix and the rh.inflated.nofix. Something big is wrong, like > large > parts of the skull attached to the surface or something like that > > cheers > Bruce > > > On Sun, 24 Mar 2019, Soichi Hayashi wrote: > > > > > External Email - Use Caution > > > > Hello. > > I am trying to troubleshoot an issue where recon_all is not finishing > after >24 hours. It's getting > > stuck when it tries to run the following command. > > > > $ mris_fix_topology -rusage > ./output/touch/rusage.mris_fix_topology.rh.dat -mgz -sphere > > qsphere.nofix -ga -seed 1234 output rh > > INFO: assuming .mgz format > > reading spherical homeomorphism from 'qsphere.nofix' > > using genetic algorithm with optimized parameters > > setting seed for random number genererator to 1234 > > > > ************************************************************* > > Topology Correction Parameters > > retessellation mode: genetic search > > number of patches/generation : 10 > > number of generations : 10 > > surface mri loglikelihood coefficient : 1.0 > > volume mri loglikelihood coefficient : 10.0 > > normal dot loglikelihood coefficient : 1.0 > > quadratic curvature loglikelihood coefficient : 1.0 > > volume resolution : 2 > > eliminate vertices during search : 1 > > initial patch selection : 1 > > select all defect vertices : 0 > > ordering dependant retessellation: 0 > > use precomputed edge table : 0 > > smooth retessellated patch : 2 > > match retessellated patch : 1 > > verbose mode : 0 > > > > ************************************************************* > > $Id: mris_fix_topology.c,v 1.50.2.1 2016/10/27 22:25:58 zkaufman Exp $ > > $Id: mrisurf.c,v 1.781.2.6 2016/12/27 16:47:14 zkaufman Exp $ > > reading input surface > /home/hayashis/Downloads/output/surf/rh.qsphere.nofix... > > before topology correction, eno=-696 (nv=191488, nf=384368, ne=576552, > g=349) > > reading brain volume from brain... > > reading wm segmentation from wm... > > using quasi-homeomorphic spherical map to tessellate cortical surface... > > > > Correction of the Topology > > Finding true center and radius of Spherical Surface...done > > Surface centered at (0,0,0) with radius 100.0 in 9 iterations > > marking ambiguous vertices... > > 133741 ambiguous faces found in tessellation > > segmenting defects... > > 63 defects found, arbitrating ambiguous regions... > > analyzing neighboring defects... > > -merging segment 16 into 0 > > -merging segment 23 into 0 > > -merging segment 48 into 0 > > -merging segment 32 into 22 > > -merging segment 49 into 47 > > -merging segment 54 into 51 > > 57 defects to be corrected > > 0 vertices coincident > > Computing Initial Surface Statistics > > -face loglikelihood: -9.3123 (-4.6561) > > -vertex loglikelihood: -6.5427 (-3.2713) > > -normal dot loglikelihood: -3.5794 (-3.5794) > > -quad curv loglikelihood: -6.0564 (-3.0282) > > Total Loglikelihood : -25.4907 > > > > CORRECTING DEFECT 0 (vertices=65141, convex hull=8287, v0=517) > > > > --------------- > > > > After displaying the last line, the process seems to be stuck running > with 100% cpu (single core) > > for >24 hours until our batch scheduler kills it. I think the issue is > with my input data, but it > > looks clean and well ACPC aligned, and I don't know what's wrong with > it. The input image dimensions > > are 182 x 218 x 182. > > > > Does anyone have any suggestion on how to troubleshoot this problem? > > > > Thank you, > > > > Soichi Hayashi > > Indiana University > > > >

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recon from 7T data
by Barletta, Valeria 26 Mar '19

26 Mar '19

Dear Freesurfers, I am trying to perform the FreeSurfer cortical reconstruction process from my 7 Tesla MEMPRAGE, but am getting very bad results (see first attachment) compared to what I had using the 3 Tesla images (second attachment). Before launching the "recon-all ....... -all" command, I applied the FreeSurfer Gradient non-linearity correction. What can have been the problem? Thank you very much for your help, Valeria

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significant results in FS (CT of ROI values) is not significant in SPSS
by Yali Jiang 25 Mar '19

25 Mar '19

External Email - Use Caution Dear all, I was asked to provide a power calculation of my group comparison results on cortical thickness, so I extracted all clusters with significance in CT into SPSS. but I found the cluster value of CT is not significant in SPSS based on group comparison. so I got a very small effect size although the original ROI was generated by a initial threshold of p < 0.001, and corrected by monte-carlo p < 0.05, two sided. Is this possible? how can I resolve it? best, Yali

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Errors in white matter surfaces from scan collected on 3T Siemens Skyra scanner at .6 mm resolution
by Lalonde, Francois (NIH/NIMH) [E] 25 Mar '19

25 Mar '19

External Email - Use Caution Hi, We collected an MP-RAGE scan at .6mm isotropic resolution with the TR bumped up to TR=5. Subject motion artifacts were mitigated by using a KinetiCor motion correction system. We followed the recommendations for processing submillimeter scans described in the FreeSurfer Wiki i.e. we added the -cm flag to recon-all and included the mris_inflate -n 100 expert option. The attached PDF of the white matter surfaces shows that they appear to be underestimated. The surface estimates fall short of the actual grey/white matter boundary. Arrows point to the most affected areas and the second image is the same as the first but without the yellow white matter surface line. FTP is disabled on my government computer. Please specify the recipient email if I have to transfer the file using FileDrop. Could you suggest other options either at the time of scanning or in running recon-all that could help better segment the white matter? Thanks, François Lalonde, Ph.D. DNU/HGB/NIMH/NIH 10 Center Drive, Room 4D18 Bethesda, MD. 20892 flalonde(a)nih.gov

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mri_glmfit flags not working
by Olamide Abiose 25 Mar '19

25 Mar '19

External Email - Use Caution Hello, I am struggling to run mri_glmfit because various flags seem to be going unrecognized. This is my command: mri_glmfit —-table V1_lh_stats.txt —-fsgd glm/gender_age.fsgd dods —-C lh-Avg-thickness-age-Cor.mtx —-surf fsaverage lh —-cortex --glmdir lh.V1_gender_age.glmdir Where "V1_lh_stats.txt" is a table of V1 thickness values produced by aparcstats2table. I've run into issues with the --table, --fsgd, and --surf flags (as I shuffle around the command line arguments and/or replace the --table flag with a --y flag). Any idea what's going wrong? Thank you!

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(no subject)
by Erika Portera 25 Mar '19

25 Mar '19

External Email - Use Caution Dear Freesurfer experts, I have difficulty in introducing parts of white matter inside the superficial pial and white. I used control points and modified the white matter volume but without resolution. Do you have any advice? Thank you

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[WARNING: UNSCANNABLE EXTRACTION FAILED]talairach_afd: Talairach Transform: transforms/talairach.xfm ***FAILED***
by Chhavi Yadav 25 Mar '19

25 Mar '19

External Email - Use Caution Hi, I am a beginner to freesurfer. Never used it before. Currently I am working on some dicoms from ADNI that I want to preprocess. But I am getting this 'talairach_afd: Talairach Transform: transforms/talairach.xfm ***FAILED*** ' error. I am attaching the error log and other files for your reference. Please help me out. Regards, Chhavi

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mri_gtmpvc on Tau and FDG PET
by miracle ozzoude 25 Mar '19

25 Mar '19

External Email - Use Caution Hello FreeSurfer, I would like to know if mri_gtmpvc for PetSurfer is appropriate for Tau (AV_1451) and FDG pet imaging. Also, is cerebellum a good reference point for both tracers? Thanks. Paul

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Re. Help with TRACULA configuration file
by Yuwen Hung 25 Mar '19

25 Mar '19

External Email - Use Caution Dear TRACULA expert: I wonder if it is recommended to turn on performing of registeration-based B0-inhomogeneity compensation (set dob0 = 1) and utilise the field map magnitude and phase dicom files? The default is set to not to use these functions, but I wonder whether using them may result in better outcomes? Thank you, Yuwen

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