Re: [Freesurfer] Unknown error

2008-04-29 Thread Jerry Yeou-Wei Chen
> is at least 100 or so in the image (it can be more). > > 2. You shouldn't need to erase anything - just rerun recon-all > > cheers, > Bruce > > On Tue, 29 Apr 2008, Jerry Yeou-Wei Chen wrote: > > Okay, thanks! I'll give that a shot... but I have a co

Re: [Freesurfer] Unknown error

2008-04-29 Thread Jerry Yeou-Wei Chen
s, but I guess something is failing in > your case. > > cheers, > Bruce > > > > On Mon, 28 Apr 2008, Jerry Yeou-Wei Chen wrote: > > Hi Bruce, > > > > Looking at one of the successfully processed subjects in tkmedit, I > > would > > guesst

Re: [Freesurfer] Unknown error

2008-04-28 Thread Jerry Yeou-Wei Chen
Sometimes nu_correct > can create very dark images, and there are some switches you can loo through > to correct them. Alternatively if it is the 001.mgz, mri_convert has a scale > option you can use. > > cheers, > Bruce > > > > On Fri, 25 Apr 2008, Jerry Yeou-Wei Chen

Re: [Freesurfer] Unknown error

2008-04-25 Thread Jerry Yeou-Wei Chen
o answer (he is out- > of-town today). I think he will ask about your scan parameters, ie, how > is your scanner setup? It sounds as if something is not quite right in > the data coming-off the scanner. > > Nick > > > On Tue, 2008-04-22 at 14:26 -0400, Jerry Yeou-Wei C

Re: [Freesurfer] Unknown error

2008-04-22 Thread Jerry Yeou-Wei Chen
gt; the mri peak is at zero, which is wrong (it should be around 116/117 or > so). > > if you view nu.mgz (tkmedit -f nu.mgz), does it look ok? is it oriented > correctly? > > Nick > > > > > On Tue, 2008-04-22 at 12:28 -0400, Jerry Yeou-Wei Chen wrote: > > Hell

[Freesurfer] Unknown error

2008-04-22 Thread Jerry Yeou-Wei Chen
Hello, I am having trouble deciphering why I got the error attached below. Any suggestions would be greatly appreciated! Thanks, - Jerry Tue Apr 22 10:15:22 EDT 2008 talairach_avi done cp transforms/talairach.auto.xfm transforms/talairach.xfm # [

Re: [Freesurfer] Monte Carlo Simulation w/ custom design matrix

2008-04-18 Thread Jerry Yeou-Wei Chen
uld be fwhm.dat > along with the y.fsgd. > > > How did I miss that??? > > Thanks! > > - Jerry > > > > On Thu, Apr 17, 2008 at 3:01 PM, Doug Greve <[EMAIL PROTECTED]> > > wrote: > > > >> there should be a fwhm.dat file in the output. > &g

Re: [Freesurfer] Monte Carlo Simulation w/ custom design matrix

2008-04-18 Thread Jerry Yeou-Wei Chen
How did I miss that??? Thanks! - Jerry On Thu, Apr 17, 2008 at 3:01 PM, Doug Greve <[EMAIL PROTECTED]> wrote: > there should be a fwhm.dat file in the output. > > doug > > > Jerry Yeou-Wei Chen wrote: > > Hello, > > I have a question regarding performing Mon

[Freesurfer] Monte Carlo Simulation w/ custom design matrix

2008-04-17 Thread Jerry Yeou-Wei Chen
Hello, I have a question regarding performing Monte Carlo simulations when a custom design matrix is being used. The wiki says that "For both MC simulations, you must supply the smoothness of your data as Full-Width/Half-Max (FWHM) of the residual. This can be obtained from the ResidualFWHM value

Re: [Freesurfer] FSGD

2008-04-13 Thread Jerry Yeou-Wei Chen
erated and called y.mgh). > > The fsgdPlot.tcl problem is (was) unrelated to this. > > Nick > > > On Sun, 2008-04-13 at 16:08 -0400, Jerry Yeou-Wei Chen wrote: > > Hello, > > > > I am getting the following error when I try to load an FSGD file in > > tksurfe

[Freesurfer] FSGD

2008-04-13 Thread Jerry Yeou-Wei Chen
Hello, I am getting the following error when I try to load an FSGD file in tksurfer. The stats were processed using a custom design matrix without error and I am able to view the results. FSGD file doesn't contain a PlotFile entry. Error loading GDF /scratch/freesurfer/subjects/adina/descic39_all

Re: [Freesurfer] Interactions for continuous variables

2008-04-11 Thread Jerry Yeou-Wei Chen
That was the problem! Thanks! - Jerry On Thu, Apr 10, 2008 at 5:55 PM, Doug Greve <[EMAIL PROTECTED]> wrote: > I think the problem is that the last line is a blank line. Remove that > and retry. > > doug > > Jerry Yeou-Wei Chen wrote: > > I am getting the followi

Re: [Freesurfer] Interactions for continuous variables

2008-04-10 Thread Jerry Yeou-Wei Chen
940126218, which is not a matrix. could not allocate 822685706 x 805908489 matrix Cannot allocate memory unsupported matlab format -849662976 (unknown) Cannot allocate memory* On Thu, Apr 10, 2008 at 11:02 AM, Jerry Yeou-Wei Chen <[EMAIL PROTECTED]> wrote: > Thanks for the clarification, Do

[Freesurfer] Mean Centering

2008-04-10 Thread Jerry Yeou-Wei Chen
Hello, Are regressors mean centered for mri_glmfit? Judging by one of my previous Xg.dat files, it does not appear so. If not, I plan to manually enter my design matrix, with mean centered regressors. Do I need to enter the corresponding values in the FSGD file as mean centered? or can they remai

Re: [Freesurfer] Interactions for continuous variables

2008-04-10 Thread Jerry Yeou-Wei Chen
t; > Explicitly specify the design matrix. Can be in simple text or in matlab4 > format. If matlab4, you can save a matrix with save('X.mat','X','-v4'); > > It does not need/expect any extension. > > > doug > > > Jerry Yeou-Wei Chen wrote: >

Re: [Freesurfer] Interactions for continuous variables

2008-04-09 Thread Jerry Yeou-Wei Chen
ry On Wed, Apr 9, 2008 at 4:58 PM, Jerry Yeou-Wei Chen <[EMAIL PROTECTED]> wrote: > Great! Thanks! > - Jerry > > > On Wed, Apr 9, 2008 at 3:50 PM, Doug Greve <[EMAIL PROTECTED]> > wrote: > > > > > You can pass custom design and contrast matrices

[Freesurfer] glmdir

2008-04-09 Thread Jerry Yeou-Wei Chen
Hi, Just a very quick question about the glmdir flag for mri_glmfit when running the group analysis via command line: If I am interested in multiple contrasts, can glmdir be the same for subsequent iterations of mri_glmfit with different contrast vectors? (I understand that each contrast comes up

[Freesurfer] Interactions for continuous variables

2008-04-09 Thread Jerry Yeou-Wei Chen
Hello, I would like to know how to examine an interaction between continuous variables. In SPM, my understanding is that a new interaction regressor, comprised of the product of the two continuous variables of interest, can be coded and entered into the model. Would this be appropriate for CTA grou

[Freesurfer] Question about slopes

2008-03-19 Thread Jerry Yeou-Wei Chen
Hello, The attached image shows a plot generated from a design with one continuous variable (gender) and three continuous variables (called N, E, P), analyzed using the "old" method via command line rather than QDEC. For mri_glmfit, the DODS option was used and the contrast was 0 0 1 -1 0 0 0 0 (t

[Freesurfer] QDEC limited regressors

2008-03-18 Thread Jerry Yeou-Wei Chen
Hello, I would like to know why we are limited to 4 regressors in the design specification within the QDEC GUI. If I understand correctly, there is no such limitation in the "old" method (via command line). Thanks, - Jerry ___ Freesurfer mailing list Free

[Freesurfer] noaseg usage and consequences

2008-02-04 Thread Jerry Yeou-Wei Chen
Hello, We ran into the following error during autorecon2 with one subject: mri_fill: could not find any points where lh and rh wm are nbrs It has been suggested to another user that the "-noaseg" flag be used. (http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg06560.html) However,

[Freesurfer] Image scaling in the MGZ file format

2007-07-12 Thread Jerry Yeou-Wei Chen
Hello Freesurfer Forum, We have a question about the M matrix, found in the .mgz file header. We loaded an .mgz file into Matlab and took a look at the affine transform matrix M from the header: M(1,:) = [-1 0 0 132.7486]; M(2,:) = [ 0 0 1 -105.7281]; M(3,:) = [ 0 -1 0 131.7424]; M

Re: [Freesurfer] MR to MGZ

2007-07-10 Thread Jerry Yeou-Wei Chen
this works mri_convert -it dicom /home/omid/freesurfer/subjects/IBS_raw/_orig_/csd/E703S2I1.MR /home/omid/freesurfer/subjects/IBS_raw/csd/mri/orig/001.mgz Jerry Yeou-Wei Chen wrote: Hello, We have been having difficulties importing GE .MR files into FreeSurfer. We have tried a numbe