Freesurfer November 2004

freesurfer@nmr.mgh.harvard.edu

22 participants
53 discussions

FsFast file conversion/preprocessing
by Margaret Duff 01 Nov '04

01 Nov '04

Hi, I have 12 runs of functional data I am trying to convert to FSFast formats and then preprocess. I have been using mri_convert to make my .img files into bshorts. However mri_convert makes only 30 files when my folders originally contained 37 or 73 files. Is this what it is supposed to do? I am also then trying to run preproc-sess on these files but i keep getting an error during the motion correction of the first run. it says can't register a 1 brick dataset to itself, and ERROR: 3dvolreg existed with status 1. I am using the command "preproc-sess -sf sessid -df sesspar -fwhm 6" for preprocessing and "mri_convert 028/f001.img 028/f_001.bshort" for file conversion. Does anyone know why my steps aren't working or knows of a better way to do these steps? Thank you so much, Margaret Duff

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tkregister2
by George Papadimitriou 01 Nov '04

01 Nov '04

Hi all, I'd really appreciate it if I can get some input on the issue below. I need to come up with an answer this week. I am having some trouble with manual co-registration using tkregister2. I have placed the data in: /space/friday/users/dtuch/tkregister2 Here is the info: f prefix --> template s prefix --> subject to be co-registered with template s_to_f/ --> contains the co-registered result (COR) I did the co-registration using the following command: % tkregister2 --targ f_000.bfloat --mov s_000.bfloat --reg \ register1.dat It worked pretty well; the only trick was that I had to click in the image window and hit 'i' to turn on the automatic intensity normalization. This process saved a new transformation matrix to the register1.dat file. The register1.dat file was used to transform the input volume by using the mri_vol2vol command: % mri_vol2vol --in f_000.bfloat --out s_to_f/. --interp \ trilin --temp f_000.bfloat --xfm register1.dat --invxfm The problem is that when I try to load the result in tkmedit (or tkregister2): tkmedit -f s_to_f I don't see an output volume (every voxel seems to be zero) Can you please take a look at the data when you get a chance? Please, let me know if you need me to provide additional info. Thanks a lot! George P. PS After you evaluate this case, if you also think I need to email the freesurfer list, just let me know. On Wed, 27 Oct 2004, David Tuch wrote: > > Hi George, > > can you direct me to avg_000.bfloat ? > > tnx, > D > > > On Wed, 27 Oct 2004, George Papadimitriou wrote: > >> Hi Dave, >> >> Have you run into the issue described below? >> >> Thanks a lot! >> George P. >> >> ---------- Forwarded message ---------- >> Date: Wed, 27 Oct 2004 11:53:07 -0400 (EDT) >> From: George Papadimitriou <georgep(a)nmr.mgh.harvard.edu> >> To: freesurfer(a)nmr.mgh.harvard.edu >> Subject: tkregister2 question >> >> I am trying to register a lowb volume to an average volume. >> >> In this particular case, I'm trying to use tkregister2: >> >> % tkregister2 --targ avg_000.bfloat --mov indivsubj_000.bfloat --reg \ >> register.dat >> >> I am having a problem with the brightness of the TARG volume. It seems to >> be set near ~1, and using the fmov option only adjusts the brightness on >> the MOV volume. It is kind of hard to align them, when the target volume >> looks like a binary mask (appears all white). Have you seen this before? >> >> Changing the contrast doesn't seem to help. >> >> Thanks, >> George P. >> >

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filling the white matter
by Wan Park 01 Nov '04

01 Nov '04

when I run recon-all -s uf1 -talairach (uf1 is the subject) I receive this message: $ ####################################### INFO: SUBJECTS_DIR is /Volumes/stem/freesurfer/subjects --------------------------------------------- Talairach Fri Oct 29 17:23:19 ADT 2004 /Volumes/stem/freesurfer/subjects/um1/mri talairach2 um1 INFO: registering um1 Fri Oct 29 17:23:19 ADT 2004 -------------------------------------------- mri_convert orig orig/orig.mnc mri_convert orig orig/orig.mnc reading from orig... TR=0.00, TE=0.00, TI=0.00, flip angle=0.00 i_ras = (-1, 0, 0) j_ras = (0, 0, -1) k_ras = (0, 1, 0) writing to orig/orig.mnc... -------------------------------------------- mritotal -verbose -debug -clobber -protocol icbm orig/orig.mnc transforms/talairach.xfm -------------------------------------------- mri_add_xform_to_header /Volumes/stem/freesurfer/subjects/um1/mri/transforms/talairach.xfm /Volumes/s m/freesurfer/subjects/um1/mri/orig /Volumes/stem/freesurfer/subjects/um1/mri/orig Fri Oct 29 17:25:26 ADT 2004 INFO: starting per-hemisphere operations ----- Starting Hemisphere rh -------- ----- Starting Hemisphere lh -------- ------------------------------------------- recon-all finished without error at Fri Oct 29 17:25:26 ADT 2004 done but when I return to csurf and I try to create the surface, I receive this message when it is filling the white matter: area[0] = 2 (min = 350, max = 790), aspect = 2.00 (min = 0.60, max = 1.20) need search nearby using +/- offset search region where offset is 3..... using +/- offset search region where offset is 6..... using +/- offset search region where offset is 9..... using +/- offset search region where offset is 12..... using +/- offset search region where offset is 15..... using +/- offset search region where offset is 18..... using +/- offset search region where offset is 21..... using +/- offset search region where offset is 24..... using +/- offset search region where offset is 27..... using +/- offset search region where offset is 30..... using +/- offset search region where offset is 33..... using +/- offset search region where offset is 36..... using +/- offset search region where offset is 39..... using +/- offset search region where offset is 42..... using +/- offset search region where offset is 45..... using +/- offset search region where offset is 48..... /Users/wanpark/Desktop/FreeSurfer/freesurfer/bin/Darwin/mri_fill: could not find pons No such file or directory INFO: volume does not have linear_transform set nor lta is given by option.-xform. INFO: use identity matrix as the talairach transform. INFO: use src volume parameters for the talairach volume. INFO: Modifying dst c_(r,a,s), using the transform dst find_cutting_plane:seed point not in structure! Searching neighborhood... INFO: Modifying dst c_(r,a,s), using the transform dst talairach cc position changed to (2.00, 29.00, -8.00) INFO: Modifying dst c_(r,a,s), using the transform dst find_cutting_plane:seed point not in structure! Searching neighborhood... Command Finished Could you tell me what to do? Thanks Wan

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Freesurfer November 2004