Freesurfer

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SNR values
by Chekema Nayasha Prince 24 Jun '04

24 Jun '04

Is it possible to get SNR values from freesurfer for regions of the brain? -Keyma

2 1

missing curvatures
by nima＠nmr.mgh.harvard.edu 24 Jun '04

24 Jun '04

hi after "making final surfaces" i enountered something strange! lh: "inflated" brain and "smoothwm" has no curvature but other surfaces like orig va qshere are normal rh: inflated brain has the curvature but other surfaces are normal logfiles are shown below. what is the prob?!?!? any idea? cheers nimA FOR LEFT HEMISPHERE "INFLATED": " env tksurferinterface=csurf patchname= /space/lyon/1/home/inverse/freesurfer_alpha/bin/Linux/tksurfer -sleep_s2 lh inflated -tcl /tmp/TmpTclSurf.12210 MRISreadVertexPositions(/space/humpback/2/users/nima/csurf/sleep_s2/surf/lhorig): surfaces differ. No such file or directory MRISreadOriginalProperties: could not read surface file /space/humpback/2/users/nima/csurf/sleep_s2/surf/lh.orig No such file or directory Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkm_wrappers.tcl Using libtclfsgdf.so Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkUtils.tcl Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkUtils.tcl Successfully parsed tksurfer.tcl MRISreadNewCurvature: incompatible vertex number in file /space/humpback/2/users/nima/csurf/sleep_s2/surf/lh.curv surfer: current subjects dir: /space/humpback/2/users/nima/csurf surfer: in subjects "scripts" dir surfer: session root data dir ($session) set to: surfer: /autofs/space/humpback_002/users/nima/csurf/sleep_s2 surfer: /space/humpback/2/users/nima/csurf/sleep_s2/mri/T1/COR-.info surfer: vertices=125362, faces=250720 surfer: using interface /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tksurfer.new.tcl Read /space/lyon/1/home/inverse/freesurfer_alpha/surface_labels.txt, found 95 structures tksurfer: run tcl script: /tmp/TmpTclSurf.12210 surfer: single buffered window surfer: curvature read: min=0.000000 max=0.000000 " ps. point is that lh.orig exists! so i do not know what it says that it can not find it! FOR LEFT HEMISPHERE "INFLATED": "env tksurferinterface=csurf patchname= /space/lyon/1/home/inverse/freesurfer_alpha/bin/Linux/tksurfer -sleep_s2 lh smoothwm -tcl /tmp/TmpTclSurf.12210 MRISreadVertexPositions(/space/humpback/2/users/nima/csurf/sleep_s2/surf/lhorig): surfaces differ. No such file or directory MRISreadOriginalProperties: could not read surface file /space/humpback/2/users/nima/csurf/sleep_s2/surf/lh.orig No such file or directory Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkm_wrappers.tcl Using libtclfsgdf.so Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkUtils.tcl Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkUtils.tcl Successfully parsed tksurfer.tcl MRISreadNewCurvature: incompatible vertex number in file /space/humpback/2/users/nima/csurf/sleep_s2/surf/lh.curv surfer: current subjects dir: /space/humpback/2/users/nima/csurf surfer: in subjects "scripts" dir surfer: session root data dir ($session) set to: surfer: /autofs/space/humpback_002/users/nima/csurf/sleep_s2 surfer: /space/humpback/2/users/nima/csurf/sleep_s2/mri/T1/COR-.info surfer: vertices=125362, faces=250720 surfer: using interface /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tksurfer.new.tcl Read /space/lyon/1/home/inverse/freesurfer_alpha/surface_labels.txt, found 95 structures tksurfer: run tcl script: /tmp/TmpTclSurf.12210 surfer: single buffered window surfer: curvature read: min=0.000000 max=0.000000" ps. point is that lh.orig exists! so i do not know what it says that it can not find it! FOR RIGHT HEMISPHERE "INFLATED SURFACE": ha/bin/Linux/tksurfer -sleep_s2 rh qsphere -tcl /tmp/TmpTclSurf.12210 mrisReadTriangleFile(/space/humpback/2/users/nima/csurf/sleep_s2/surf/rh.orig): surface doesn't match /space/humpback/2/users/nima/csurf/sleep_s2/surf/rh.qsphere No such file or directory mrisReadTriangleFile failed. No such file or directory MRISreadOriginalProperties: could not read surface file /space/humpback/2/users/nima/csurf/sleep_s2/surf/rh.orig No such file or directory Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkm_wrappers.tcl Using libtclfsgdf.so Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkUtils.tcl Reading /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tkUtils.tcl Successfully parsed tksurfer.tcl MRISreadNewCurvature: incompatible vertex number in file /space/humpback/2/users/nima/csurf/sleep_s2/surf/rh.curv surfer: current subjects dir: /space/humpback/2/users/nima/csurf surfer: in subjects "scripts" dir surfer: session root data dir ($session) set to: surfer: /autofs/space/humpback_002/users/nima/csurf/sleep_s2 surfer: /space/humpback/2/users/nima/csurf/sleep_s2/mri/T1/COR-.info surfer: vertices=127844, faces=255756 surfer: using interface /space/lyon/1/home/inverse/freesurfer_alpha/lib/tcl/tksurfer.new.tcl Read /space/lyon/1/home/inverse/freesurfer_alpha/surface_labels.txt, found 95 structures tksurfer: run tcl script: /tmp/TmpTclSurf.12210 surfer: single buffered window surfer: curvature read: min=0.000000 max=0.000000" ps. rh.orig and rh.qsphere exist in surf directory!!!!

2 1

pial surface not plump
by Josh Snyder 23 Jun '04

23 Jun '04

Hi, The pial surface generated in one of my recons doesn't look standard. Part of it looks plump as usual, but mostly the anterior portion looks more like the smoothwm surface -- the gyri look too thin. I've checked in tkmedit, and it's hard to tell, but it does look as though in some areas it's choosing the wrong cut-off points between grey matter and empty space, leaving grey matter outside the pial surface. Does anyone know what might cause this, or have a recommendation for dealing with it? Thanks, Josh

1 0

mri_convert problem
by Scott.H.Johnson＠Dartmouth.EDU 22 Jun '04

22 Jun '04

Hello, We are tryying to convert some raw images from our GE LX scanner into cor format using "mri_convert" with plans to do inflation etc. We have tried a number of ways (see below) to no avail. The program tells us it is "reading images from 001/I.001," but never comes back..... If anyone has any suggestions, I would be very grateful. I am certain that we are overlooking something really obvious..... mri_convert 001/I.001 ./anat1 mri_convert -ot cor 001/I.001 ./anat1 note that we have the structure subjectID/mri/orig within the dir "orig" we have 001 002 003 and each contains a 124 slice spgr consecutively numbered starting with I.001 "orig" also contains empty anat1 anat2 anat3 dirs Many thanks, Scott

3 2

mritotal / Out of memory
by Patrice Seyed 22 Jun '04

22 Jun '04

Hi, I am experiencing the following error when running recon-all relating the mritotal: mritotal -verbose -debug -clobber -protocol icbm orig/orig.mnc transforms/talair ach.xfm Out of memory! ERROR: mritotal failed I found this brought up as an issue on the freesurfer mailing list but not a posted solution. I have been advised this is related to RH 9.0 and also that it is fixed in the recent snapshot... Here are my current specs: Feb. 18th, 2004 Snapshot/full install of freesurfer from (http://surfer.nmr.mgh.harvard.edu/download.html) Is there a snapshot/patch more recent than this for freesurfer? Caosity (http://www.caosity.org/),which is based off the current Red Hat EL 3.0. Re: the LANG variable in my current tcsh environment is: $ echo $LANG en_US.UTF-8 I edited the beginning of recon-all to reflect these variables as was suggested: set LANG = en_US.UTF-8 set LANGVAR = en_US.UTF-8 My next run seems to have crashed the system right around where swap space has run out (interesting): Mem: 513464 506716 6748 0 2040 7316 -/+ buffers/cache: 497360 16104 Swap: 1044176 1044044 132 total used free shared buffers cached Mem: 513464 505952 7512 0 2024 7180 -/+ buffers/cache: 496748 16716 Swap: 1044176 1044176 0 Thanks for any suggestions. Regards, Patrice Seyed Linux System Administrator - SIG RHCE, SCSA Boston University School of Medicine

5 4

Signal to Noise Values
by Chekema Nayasha Prince 22 Jun '04

22 Jun '04

Is there a way to get the SNR values from a region in the brain through tkmedit? or even a contrast to noise value? -Keyma

1 0

tkmedit/tksurfer won't start properly
by N.M. van Strien 18 Jun '04

18 Jun '04

Dear Freesurfer experts, I have installed the snapshot of freesurfer on my computer in order to learn how to create flat maps with functional overlays. The freesurfer interface comes up nicely and data processing seems to work properly. However, until now I have not been able to view the data with tkmedit and tksurfer. I have studied the FAQomatic but have not been able to resolve this problem. In the case of tkmedit it seems as if the program is unable to write to the screen. However no error messages occur, even when run from the command line. It just starts - works for a second or two - and then stops without displaying anything. Tksurfer on the other hand produces to windows on the screen (one with the inflated image), but the window in which the controls should be displayed remains empty and unresponsive. I am running Fedora Core 2 with a kernel that is especially compiled to support the latest nvidia drivers for the geforce 4 graphics board in the system I am working on. I have checked the symlinks to the GL drivers that tkmedit and tksurfer calls and all seems to be properly installed. The static versions of the programs also do not work. Could there be any problem between the GLX drivers from NVIDIA and the freeglut OPENGL utility toolkit (both are the latest version)? Can you give me any suggestion what I could try next in order to get things working? Thank you, drs. Niels M. van Strien Vrije Universiteit Medisch Centrum Department of Anatomy, room MF-G102 b Van der Boechorststraat 7 P.O. Box 7057 1007 MB Amsterdam The Netherlands e-mail: n.vanstrien(a)vumc.nl phone: +31 (20) 4448047

1 0

Percent Signal Change
by Matt Cain 17 Jun '04

17 Jun '04

Greetings, I'm trying to write a script to generate hemodynamic timecourses for particular voxels. I want to imitate the feature in tkmedit where these graphs can be viewed as Percent Signal Change. I know how to generate this for averages across an ROI, but that involves computing the Average Baseline Activity, a quantity which is tied to the size ROI and thus does not make sense to use for a single voxel. Does anyone know what value is used to properly scale the hemodynamic timecourses and how to compute that value? Thanks Matt Cain mcain(a)nmr.mgh.harvard.edu

2 2

(no subject)
by faramir＠brandeis.edu 11 Jun '04

11 Jun '04

I've tried to run "csurf" on both the Ichiban and Bonaire public computers but it will not work, moving the cursor to the next line after I press enter but providing no further response. On the other hand, tkmedit and tksurfer do seem to work. Only recently (two weeks or so) the program had worked using the same path/source which I have in my .cshrc at present. Any help would be appreciated.

1 0

convert label to mask volume
by Josh Snyder 10 Jun '04

10 Jun '04

Does anyone know of a way to convert a label to a mask bvolume consisting of 1s and 0s with same FOV as a target volume?

1 0

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