[Freesurfer] Fwd: question about thalamus

2016-10-24 Thread Dorsa Haji Ghaffari
using it as a gold-standard to interpret the T1. I would > need more information to say for sure > > > > On Thu, 20 Oct 2016, Dorsa Haji Ghaffari wrote: > > So basically we have two types of images. One has a better contrast for >> seeing the STN to that we can target it f

Re: [Freesurfer] question about thalamus

2016-10-20 Thread Dorsa Haji Ghaffari
using it as a gold-standard to interpret the T1. I would > need more information to say for sure > > > > On Thu, 20 Oct 2016, Dorsa Haji Ghaffari wrote: > > So basically we have two types of images. One has a better contrast for >> seeing the STN to that we can target it f

[Freesurfer] question about thalamus

2016-10-19 Thread Dorsa Haji Ghaffari
Hi, I have done the sub-cortical segmentation in Freesurfer and have extracted the left thalamus, when I put it on top of the original MRI, it seems like it is getting out of the border of thalamus, also it is not smooth. I wanted to ask if anyone knows how to limit the computation only to thalamu

[Freesurfer] question about mask coordinates

2016-07-28 Thread Dorsa Haji Ghaffari
Hi all, I have done segmentation with Freesurfer but when I create a mask for the left thalamus and import it to CAD software it doesn't seem to be at the right coordinates. This may be due to the change in the mask volume(256x256x256) from the original MRI volume(512x512x288). I did re-slice the

Re: [Freesurfer] question about reslicing

2016-07-26 Thread Dorsa Haji Ghaffari
by processing the upsampled > data and it will waste lots of time > > > cheers > Bruce > > On Mon, 25 Jul 2016, Dorsa Haji Ghaffari wrote: > > Yes I created it using the higher resolution and I think it looks fine. I >> attached the aseg.mgz. Is there any way to c

Re: [Freesurfer] question about image size

2016-07-21 Thread Dorsa Haji Ghaffari
Thank you I'll try that. On Thursday, July 21, 2016, Bruce Fischl wrote: > try using the -rl switch in mri_convert. It will "reslice > like" the you give. Give it the 512 volume as > > cheers > Bruce > On Thu, > 21 Jul 2016, Dorsa Haji Ghaffari wrote

[Freesurfer] question about image size

2016-07-21 Thread Dorsa Haji Ghaffari
Hi, I have segmented 288 slices of 512x512 dicom MRIs but when I create a mask of the left thalamus I get 256 slices of 256x256 images. Is there any way to get the same number of slices with the same size as I had before? Thank you Dorsa ___ Freesurfer

Re: [Freesurfer] Fwd: question about voxel size

2016-07-20 Thread Dorsa Haji Ghaffari
#x27;t good enough to say how accurate it was in some > places > > On Wed, 20 Jul 2016, Dorsa Haji Ghaffari wrote: > > Yes it is taken at 3T. I have asked our team to provide these information >> about the >> MRIs and will let you know when I hear back. I also wanted to ask

Re: [Freesurfer] Fwd: question about voxel size

2016-07-20 Thread Dorsa Haji Ghaffari
, Bruce Fischl wrote: > what is a "3TS" image? Do you mean it was acquired at 3T? What sequence > and what parameters (TE/TR/TI/TD/flip angle)? > > cheers > Bruce > On Tue, 19 Jul 2016, Dorsa > Haji Ghaffari wrote: > > > Hi Bruce, > > that is a 3TS T1

Re: [Freesurfer] Fwd: question about voxel size

2016-07-19 Thread Dorsa Haji Ghaffari
, Bruce Fischl wrote: > also, please post to the list so that others can answer! > thanks > Bruce > On Tue, 19 Jul 2016, Dorsa Haji Ghaffari wrote: > > Here it is. Also can you explain why the algorithm works best with 1mm^3 >> voxel size? >> >> Thank you! >>

Re: [Freesurfer] question about voxel size

2016-07-19 Thread Dorsa Haji Ghaffari
pushing the resolution and if > they are really that high res they will be either very noisy or very long > scans (or both) > > cheers > Bruce > > > On Tue, 19 Jul 2016, Dorsa Haji Ghaffari wrote: > > Hi, >> I have a T1 weighted MRI which I want to segment using Free

[Freesurfer] question about voxel size

2016-07-19 Thread Dorsa Haji Ghaffari
Hi, I have a T1 weighted MRI which I want to segment using Freesurfer. The voxel sizes are 0.48*0.48*0.48. I read that the ideal voxel size for freesurfer is 1mm^3. Is there any manual adjustments that I can make to get good results with my 0.48 voxel size images? Thank you Dorsa Ghaffari __

[Freesurfer] Refining subcortical structures

2016-07-08 Thread Dorsa Haji Ghaffari
Hi, I want to refine the surface of my segmented subcortical structures such as thalamus. I know -fix is used for refining the cortex surface, but is there any function that refines the subcortical structures? Thank you Dorsa ___ Freesurfer mailing lis

Re: [Freesurfer] question about exporting volumes

2016-07-07 Thread Dorsa Haji Ghaffari
you mean isolate? what do you mean export? You can create a > binary mask in nifti format with mri_binarize --i aseg.mgz --match 10 49 > --o thalamus.mask.nii.gz > > > On 07/06/2016 04:46 PM, Dorsa Haji Ghaffari wrote: > > > > > > > > Hi, > > > > I was

[Freesurfer] Question about Thalamus segmentation

2016-07-07 Thread Dorsa Haji Ghaffari
Hi, I am trying to segment the thalamus into its nuclei such as VLA , VLP and VIM. I see those labels available in the atlas but I do not get any of them in my segmentation. Does anyone have any idea how to do that? Thank you Dorsa ___ Freesurfer maili

[Freesurfer] question about exporting volumes

2016-07-06 Thread Dorsa Haji Ghaffari
Hi, I was able to segment the MRI successfully, now I am trying to isolate the thalamus and export it out of FS as a volume. Is there a way to do that in FS? Thank you Dorsa ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mg

Re: [Freesurfer] Question about FreeSurfer

2016-06-28 Thread Dorsa Haji Ghaffari
ame>. It will figure out > > the rest of them > > On Tue, 28 Jun 2016, Dorsa Haji Ghaffari wrote: > > > Hi, > > I am a little confused about how should I save my files to execute > recon-all on > > them. I have 240 slices of dicom format and I put them in a folde

Re: [Freesurfer] Question about FreeSurfer

2016-06-28 Thread Dorsa Haji Ghaffari
there are lots of tutorials and > sample datasets and such > > cheers > Bruce > > On Mon, 27 Jun 2016, Dorsa Haji > Ghaffari wrote: > > > Hi, > > I am graduate student at the University of Michigan and I am performing > > research on deep brain stimu

Re: [Freesurfer] Question about FreeSurfer

2016-06-27 Thread Dorsa Haji Ghaffari
hours is to process the data > from a single subject at a single timepoint. If you check out our wiki > (http://surfer.nmr.mgh.harvard.edu/fswiki) there are lots of tutorials and > sample datasets and such > > cheers > Bruce > > On Mon, 27 Jun 2016, Dorsa Haji > Gh

Re: [Freesurfer] Question about FreeSurfer

2016-06-27 Thread Dorsa Haji Ghaffari
Hi, I am graduate student at the University of Michigan and I am performing research on deep brain stimulation. I want to warp an anatomical brain atlas to individual patient MRIs to get the patient specific brain models out of it. I chose FreeSurfer to do this and I have installed it on my comput