RE: [Freesurfer] mris_glm

2005-06-28 Thread Fornito, Alexander
Hi again, I've been playing around with the other segmentation fault I was getting (stage 1 recon-all with the 3T images). I've noticed that my 1.5T images (with which I have no problems) are coronally acquired, 256 x 256 x 123 (x, y, z) , voxel size 0.9 x 0.9 x 1.5, 16 bit. My 3Ts are 512 x 512

RE: [Freesurfer] mris_glm

2005-06-28 Thread Fornito, Alexander
Hi Nick, Here's the output with the echo command. Thanks for your help. make_average_surface --echo --subjects 1000186 1000187 1000188 1000189 1000190 1000191 1000192 1000194 if ( 0 ) then breaksw end while ( 9 != 0 ) set flag = --subjects if ( ! 0 ) then shift endif switch ( --subjects ) if ( 8

Re: [Freesurfer] Question on FWHM in surface smoothing

2005-06-28 Thread Doug Greve
The heat kernel sounds cool :). I'll check it out. doug Moo K. Chung wrote: Hi all, heat kernel smoothing and diffusion smoothing are supposed to give the same solution to an isotropic heat equation on the cortex. the difference is that heat kernel smoothing is simpler and there is no n

RE: [Freesurfer] mris_glm

2005-06-28 Thread Nick Schmansky
Alex, I'm trying to track down the source of the segmentation fault. In the meantime, can you re-run the script with the parameter --echo just after 'make_average_surface' (and before the --subjects)? This will give me a better idea on where its faulting. I don't think the subject naming is the

Re: [Freesurfer] Question on FWHM in surface smoothing

2005-06-28 Thread Moo K. Chung
Hi all, heat kernel smoothing and diffusion smoothing are supposed to give the same solution to an isotropic heat equation on the cortex. the difference is that heat kernel smoothing is simpler and there is no need to worry about the convergence. in diffusion smoothing, there might be a ringing e

Re: [Freesurfer] Question on FWHM in surface smoothing

2005-06-28 Thread Doug Greve
Hi Moo, I actually implemented your diffusion smoother but could not quite get it to work. It might have been related to the delta t parameter. Can you give some guidance as to how to set it? What's the difference between heat kernel smoothing and diffusion smoothing? btw, the link to the "Dif

Re: [Freesurfer] Getting there but still stuck

2005-06-28 Thread Bruce Fischl
Hi Dave, you make subdirs if you have more than one acquisition of the same subject that you want to motion correct and average. It's a good idea to keep the dicom files in an orig/dicom dir so you can always get back to them. If that's the case, pick 1 file from the dicom series that you wan

[Freesurfer] Getting there but still stuck

2005-06-28 Thread David Soscia
Hey guys, I sent one messge before but it was very vague, but now that I am a little bit more knowledgeable about what I am doing, let me be more specific. I have a bunch of images (individual slices) in .dcm format. What EXACTLY should I type in the command line to convert these to .cor files?