[Freesurfer] converting from siemens IMA to mgz

2007-02-02 Thread Binyam Nardos
Hi all, I just loaded raw structural scans into one of my subject directories. They are of siemens IMA format and I used the following command: mri_convert -it siemens -ot mgz 001/ 001.mgz I then got the following error: reading from 001/... ERROR: could not parse 001/ ERROR: siemensRead(): 001/

Re: [Freesurfer] converting from siemens IMA to mgz

2007-02-02 Thread Bruce Fischl
specify one slice in the series and it will find the rest (not the directory) On Fri, 2 Feb 2007, Binyam Nardos wrote: Hi all, I just loaded raw structural scans into one of my subject directories. They are of siemens IMA format and I used the following command: mri_convert -it siemens -ot mgz

Re: [Freesurfer] converting from siemens IMA to mgz

2007-02-02 Thread Jenni Pacheco
Hi Binyam, I think you need to give it the IMA file name, so something like: mri_convert -it siemens -ot mgz 001/file.IMA 001.mgz If that doesn't work there are other options we can try. Jenni On Fri, 2 Feb 2007, Binyam Nardos wrote: Hi all, I just loaded raw structural scans into one of my s

RE: [Freesurfer] converting from siemens IMA to mgz

2007-02-02 Thread Binyam Nardos
thanks Jenni .. I had to change my input file format to siemens_dicom although they were IMAs. It seems to be working now. Binyam Binyam Nardos Cognitive Rehabilitation Research Group Washington University School of Medicine Box # 8505 Forest Park Blvd St. Louis, MO 63108 Office: (314) 454-7

[Freesurfer] Variability and randomness in algorithms

2007-02-02 Thread Bo Shi
Hi, Sorry to dredge up an old thread, I was curious about the details on where randomness is introduced in the following programs (beyond the normal floating points issues): > mris_smooth -seed 1234 > mris_sphere -seed 1234 > mris_fix_topology -seed 1234 > mris_ca_label -seed 1234 I assume t

RE: [Freesurfer] converting from siemens IMA to mgz

2007-02-02 Thread Doug Greve
Yea, some siemens scanners/dicom servers produce dicom files with IMA extensions, which fools our software into thinking it is the old ima format. doug On Fri, 2 Feb 2007, Binyam Nardos wrote: thanks Jenni .. I had to change my input file format to siemens_dicom although they were IMAs. I

[Freesurfer] transforms

2007-02-02 Thread Chacko Cherian
Hello all, Is there some information on the wiki about the srctoDst voxel-to-voxel transform and the rastoRAas transform? THAnks Chacko. Sucker-punch spam with award-winning protection. Try the free Yahoo!

Re: [Freesurfer] transforms

2007-02-02 Thread Nick Schmansky
Chacko, There is this page: http://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems and there, open Doug Greve's PowerPoint file, which describes the transforms used within Freesurfer. N. On Fri, 2007-02-02 at 10:49 -0800, Chacko Cherian wrote: > Hello all, > Is there some information on

[Freesurfer] timecourse overlay

2007-02-02 Thread T. Song
Hi Bruce: Is there a way that I can load the MEG timecourse data on the freesurfer surface? Is it possible that we could get the timecourse waveform for a specific point on the surface? Thanks! Tao ___ Freesurfer mailing list Freesurfer@nmr.mgh.ha

[Freesurfer] Re: timecourse overlay

2007-02-02 Thread Bruce Fischl
sure, if you save it in the right format. The easiest thing to do would be to save it as a volume, where the 1st spatial dimension is # of vertices on the surface, and the last (4th one) is the # of time points (the 2nd and 3rd would both be 1). Or there are other formats you can save in if you

Re: [Freesurfer] timecourse overlay

2007-02-02 Thread Doug Greve
If the time course is in the proper format, then you can. It needs to be in one of the "volume" formats, eg mgh or mgh. The number of cols should equal the number of vertices, the number of rows = # of slices = 1, and the 4th dim is time. Then run tksurfer subject hemi surf -timecourse yourfile

Re: [Freesurfer] Re: timecourse overlay

2007-02-02 Thread Doug Greve
Actually, I think the w file only holds one time point, so that prob wont work. If you want to go the matlab route, you can do something like: mri_convert lh.curv lh.curv.mgh # convert to mgh for a template then in matalb f = MRIread('lh.curv.mgh'); f will be a struct f.vol will be a 4d matr

Re: [Freesurfer] Re: timecourse overlay

2007-02-02 Thread Bruce Fischl
oops, you're right. Anders wrote another format for multiple time points, but I can't seem to find it. The volume is the best way to go these days though. Bruce On Fri, 2 Feb 2007, Doug Greve wrote: Actually, I think the w file only holds one time point, so that prob wont work. If you wa

[Freesurfer] total brain volume

2007-02-02 Thread Derin Cobia
I would like to calculate total brain volume (defined as: total white, gray, and subcortical altogether). Should I take the BrainSegVol and minus out cerebellum and ventricles, or add the white and gray matter volumes from mris_anatomical_stats (it seems I remember hearing that white matter from m

Re: [Freesurfer] total brain volume

2007-02-02 Thread Bruce Fischl
Hi Derin, the aseg labeling of cortical gm is not that accurate - the surfaces are quiet a bit more so. We have a new tool for generating the estimate of the gm and wm volume from the surfaces called mris_volume and mris_wm_volume. I think Doug or Nick has integrated it into the dev version of

Re: [Freesurfer] total brain volume

2007-02-02 Thread Derin Cobia
Bruce, So if I downloaded the dev version of the program I could use it to get the volumes from subjects processed with 3.0.3? And would adding these volumes together generate the total volume I'm looking for (including subcoritical)? Thanks! -Derin > Hi Derin, > > the aseg labeling of cortica

Re: [Freesurfer] total brain volume

2007-02-02 Thread Bruce Fischl
you would need to add in whatever subcortical components you wanted to include, as they are excluded from the wm volume On Fri, 2 Feb 2007, Derin Cobia wrote: Bruce, So if I downloaded the dev version of the program I could use it to get the volumes from subjects processed with 3.0.3? And wo

Re: [Freesurfer] total brain volume

2007-02-02 Thread Doug Greve
I have not implemented it in recon-all yet. doug On Fri, 2 Feb 2007, Bruce Fischl wrote: you would need to add in whatever subcortical components you wanted to include, as they are excluded from the wm volume On Fri, 2 Feb 2007, Derin Cobia wrote: Bruce, So if I downloaded the dev vers

[Freesurfer] input registration matrix

2007-02-02 Thread Chacko Cherian
Hello All, After making changes using tkregister2 the input registration matrix changes.IS there an 'optimum' input registration matrix that i should try to get.I notice that the closer the values(last column of the input reg matrix) are to zero the better the outcome. Thanks in advance. Chacko.

[Freesurfer] some questions about volumes of aseg, .aparc, .aparc.2005s

2007-02-02 Thread Woo Suk, Tae
.Bold { font-weight: bold; } .Title { font-weight: bold; font-size: 18px; color: #cc3300; } .Code { border: #8b4513 1px solid; padding-right: 5px; padding-left: 5px;color: #66; font-family: 'Courier New' , Monospace;background-color: #ff9933; } Dear Freesurfer experts. I have some question