Freesurfer September 2014

freesurfer@nmr.mgh.harvard.edu

120 participants
164 discussions

Functional connectivity
by Martin Scherr 08 Sep '14

08 Sep '14

Dear Freesurfer experts, We are trying to perform a resting state functional connectivity analysis (seed based, seed = PCC) in a single patient. How can we visualize the map of the (expected) DMN of this single patient in freeview? We tried an overlay with <subjectname>/mri/orig.mgz and <session>/bold/fc.lpccseed.surf.lh/pr001/L_Posteriorcingulate/sig.nii.gz which didn't work. Please help! Best, Martin

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Freesurfer at 7T
by Lucy Hiscox 08 Sep '14

08 Sep '14

Dear Freesurfer experts, I am currently trying to segment a 7T image at 0.8 isotropic resolution. I have an MPRAGE scan and a Gradient echo, and want to coregister the data before processing to correct for inhomogenities, but unsure whether I can use FSL instead of SPM. I am following these instructions: https://surfer.nmr.mgh.harvard.edu/fswiki/HiResRecon I am new to SP8 and not sure what I would have to do with this information specifically: (i1./i2 .* (i2>20)) .* 100. Also, is it possible to just use the recon-all process or would you recommend going through each step individually outlined above? Is the second option the option for keeping the voxels at 0.8? Furthermore, I read somewhere that you have to use the -cm -aseg command to keep the voxels the same. is this true? Best wishes and many thanks, Lucy -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

2 1

Process with a 0.23T scan
by merlinva2012＠grannet.grm.sld.cu 08 Sep '14

08 Sep '14

Dears experts, I would be very grateful if help me with the following doubts: 1- My data was collected with a 0.23T scan. How i can process it?,Should i make any kind of pre-process before to begin with recon-all? 2- I want only to get the statistics of the caudate nucleus. Is there any way to obtain only this in the segmentation and therefore save time? Thank you. Dr. Merlin Vedecia -- Nunca digas nunca, di mejor: gracias, permiso, disculpe. Este mensaje le ha llegado mediante el servicio de correo electronico que ofrece Infomed para respaldar el cumplimiento de las misiones del Sistema Nacional de Salud. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas Infomed: http://www.sld.cu/

2 1

GLM: table with uncorrected clusters
by Robby De Pauw 08 Sep '14

08 Sep '14

Dear FS-community Thx to Doug I was able to successfully run a first analysis. However, I’d like to have a table of the uncorrected clusters. Is there any flag I can add to write these clusters to some sort of txt-file with the p-values etc.? I’m using the mri_glmfit command. Thanks, Best regards Robby Robby De Pauw, dra. Ghent University Department of Physiotherapy and Rehabilitation Sciences 3B3 De Pintelaan 185 B-9000 Ghent Robby.DePauw(a)Ugent.be

2 1

Intraindividual Correlation
by Martin Scherr 08 Sep '14

08 Sep '14

Dear Freesurfer-community, here is a question from a Freesurfer newbie. I am trying to correlate vertex measures of function (z) and structure (cortical thickness) vertex wise in the individual subject space of one patient. What would be a good tool for this? Best, Martin

2 1

selxavg3-sess error
by Francesca Strappini 08 Sep '14

08 Sep '14

Dear all, I've run selxavg3-sess and I got this error message when it tried to read the fmcsm file (fmc.sm5.DM.lh.nii.gz). Thank you for your help, Francesca shalim-ubuntu:/usr/local/freesurfer/fsfast/MeytalRetinotopy> selxavg3-sess -a rtopy.DM.lh -s SUBJ01 Surface data DM lh -------------------------------------------------------------- selxavg3-sess logfile is /usr/local/freesurfer/fsfast/MeytalRetinotopy/log/selxavg3-sess-bold-rtopy.DM.lh-140828163352.log -------------------------------------------------------------- ------------------------------------------- /usr/local/freesurfer/fsfast/MeytalRetinotopy/SUBJ01 Thu Aug 28 16:33:53 IDT 2014 anadir = /usr/local/freesurfer/fsfast/MeytalRetinotopy/SUBJ01/bold/rtopy.DM.lh DoGLMFit = 1 DoContrasts = 1 UpdateNeeded = 1 ------------------------------------------ ------- matlab output -------------------- No window system found. Java option 'MWT' ignored. Warning: Unable to open display 'iconic'. You will not be able to display graphics on the screen. Warning: No window system found. Java option 'MWT' ignored. < M A T L A B (R) > Copyright 1984-2013 The MathWorks, Inc. R2013b (8.2.0.701) 64-bit (glnxa64) August 13, 2013 To get started, type one of these: helpwin, helpdesk, or demo. For product information, visit www.mathworks.com. >> >> >> >> >> >> >> sxa3pwd = /usr/local/freesurfer/fsfast/MeytalRetinotopy >> sxa3cmd = /usr/local/freesurfer/fsfast/bin/selxavg3-sess -a rtopy.DM.lh -s SUBJ01 >> /usr/local/freesurfer/fsfast/toolbox/fast_selxavg3.m >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> #@# SUBJ01 ############################### /usr/local/freesurfer/fsfast/MeytalRetinotopy/SUBJ01 ------------------------- $Id: fast_selxavg3.m,v 1.100.2.2 2012/11/30 18:40:38 greve Exp $ /usr/local/freesurfer/fsfast/toolbox/fast_selxavg3.m /usr/local/freesurfer/fsfast/toolbox/fast_ldanaflac.m /usr/local/freesurfer/fsfast/MeytalRetinotopy/MRIread.m ------------------------- outtop = /usr/local/freesurfer/fsfast/MeytalRetinotopy Extension format = nii.gz ERROR: cannot determine format of /usr/local/freesurfer/fsfast/MeytalRetinotopy/SUBJ01/bold/001/fmcsm5 ERROR: attempting to read /usr/local/freesurfer/fsfast/MeytalRetinotopy/SUBJ01/bold/001/fmcsm5 ------------------------------------------ ERROR: fast_selxavg3() failed\n

2 2

mri_preproc
by shinjini＠andrew.cmu.edu 08 Sep '14

08 Sep '14

Hi, I couldn't find the documentation for mri_preproc. I know that roughly it resamples multiple subjects' brain images into the same space and then concatenates the vertices, but I want to know details like: Exactly how are the brains resampled? What is the procedure beyond the Talairach affine and spherical registration steps? Individual brain images have different numbers of vertices. Which vertices are chosen overall? How are they chosen? How is correspondence between a single vertex location across all the images established? Is the finite element approximation and vertex selection procedures invariant? Do they yield the same set and location of vertices despite minor variations? Under what conditions are they invariant? After the vertices are obtained how are they concatenated? Are they listed in a particular order and is this order the same for all the brains? How is the order determined? Thanks in advance for your reply, ~Jen

2 3

Qdec question
by Abrishamchi, Aurash David 08 Sep '14

08 Sep '14

Hello, I still cannot solve this issue. All help will be appreciated. I am running Qdec analysis on about 100 subjects and correcting with FDR. Once I do this I click the "find clusters and go to max" button and Qdec gives me a plot of all the data as well as taking me to the max vertex in the #1 cluster. I want to extract the data from the table so that I can put it in excel and calculate some correlations however I cannot find a way to do so without hovering or clicking on each data point and manually entering the values into excel. As you can imagine this is very tedious when there are 100 subjects and 12 regions that we are looking at. Please let me know if there is an alternative way to export the data into excel or even to a word processing file so that the values can be copied and pasted into excel. Best, Aurash Abrishamchi Research Co Op - NCRI - Massachusetts General Hospital 165 Cambridge Street, Suite 600 Boston, MA 02214 P: 617-726-4284 AAbrishamchi(a)mgh.harvard.edu

2 1

Manual editing compared to non-manual editing.
by Kasper Jessen 08 Sep '14

08 Sep '14

Hi, Thank you for a good freesurfer course in Copenhagen. After the course i have been wondering if there is available litterature regarding manuel editing versus non-manuel editing? Has any studies investigated the outcome/results from manual editing versus non-manuel editing on the same sample of subjects? Best regards, Kasper Jessen

3 2

Difference between surfcluster and volcluster
by Katharina Zech 08 Sep '14

08 Sep '14

Dear all, I run the surfcluster analysis (mri_surfcluster). But the tutorial tells me that there exists also mri_volcluster: Using the outputs from the estimation step and the simulations, mri_surfcluster (or *mri_volcluster*) will create two outputs: the summary file with a table of the clusters it found, and an output surface map of the clusters wth the cluster-wise p-value. The sample mri_surfcluster command is: mri_surfcluster --src lh.gender_age.glmdir/age/sig.mgh \ --csd lh.gender_age.glmdir/csd1-age.csd \ --csd lh.gender_age.glmdir/csd2-age.csd \ --sum lh.gender_age.glmdir/age/sig.cluster.sum \ --ocp lh.gender_age.glmdir/age/sig.cluster.mgh Could you please tell me the difference between surfcluster and volcluster? How do I have to change the preprocessing steps mris_preproc, smoothing (surf2surf), mdi_glmfit and the simulation to get volcluster instead of surfcluster? Thanks in advance! Katharina

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Freesurfer September 2014