[Freesurfer] VBM

2017-08-08 Thread Shane S
Hello Experts, Can we do VBM in MNI template using the outputs from recon all? Which file should I be using? And how do I smooth the volumes? Thank you for the tips! -- Shane S ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https

Re: [Freesurfer] mri_concat pet images into 1 template image

2017-04-12 Thread Shane S
/09/2017 11:58 AM, Shane S wrote: > Hi Doug, > > I want to derive a single averaged PET volume from the three > reconstructed 5 min acquisitions, expressed in detected counts. Then > we will divide the counts based on the cerebellum. Following that, I > want to use Pet

[Freesurfer] Bits of dura being captured as GM ..

2017-04-12 Thread Shane S
Hi Freesurfer Users, I am checking my data and there are many scans with a bit of dura being  captured as GM. I have attached some screenshots below. This happens in more than 50% of my subjects.  I am removing them manually them using Freeview, then running the autorecon-pial. But this will

[Freesurfer] How to segment subnuclei of thalamus?

2017-04-07 Thread Shane S
Hello Experts, I am interested to do a segmentation of the thalamus subnuclei based on T1 data. Is there any atlas that I could use for this?  Best Wishes, S ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu

Re: [Freesurfer] mri_concat pet images into 1 template image

2017-03-09 Thread Shane S
Thank you very much!! --  Shane S On 9 March 2017 at 17:01:28, Douglas N Greve (gr...@nmr.mgh.harvard.edu) wrote: If the 3 volumes are in register (ie, no motion between them), then I would just run the mri_concat command to create a single volume which is the average of the 3, then proceed

Re: [Freesurfer] mri_concat pet images into 1 template image

2017-03-09 Thread Shane S
the 3 images per subject? Thank you. --  Shane S On 9 March 2017 at 16:18:33, Douglas N Greve (gr...@nmr.mgh.harvard.edu) wrote: How are you planning on analyzing the different time points? On 03/08/2017 05:33 PM, Shane S wrote: > Dear Doug, > > My PET data is 3 x 5 minute acq

Re: [Freesurfer] mri_concat pet images into 1 template image

2017-03-08 Thread Shane S
) wrote: No, the template is a within subject template used for registration. If your pet data only has one frame (eg, FDG SUV), then you don't need to run mri_convert or mri_concat, just use your pet image as the template On 3/8/17 11:11 AM, Shane S wrote: Hello Freesurfer, I have 3 PET images

[Freesurfer] mri_concat pet images into 1 template image

2017-03-08 Thread Shane S
Hello Freesurfer, I have 3 PET images per individual. I am learning PetSurfer based on the Greve et al., 2014 paper.  On the PetSurfer link, there are 2 methods. mri_convert pet.nii.gz —frame frameno template.nii.gz  or mri_concat pet.nii.gz --mean —0 template.nii.gz What are the differences?

Re: [Freesurfer] chose between 5.3 and 6.0

2017-02-28 Thread Shane S
Hi Bruce, Where may I find more information about the differences in recon-all or subcortical segmentations (aseg) between 5.3 and 6.0?  Is the 6.0 pipeline still based on this paper? Fischl, B., Salat, D. H., Busa, E., Albert, M., Dieterich, M., Haselgrove, C., … Dale, A. M. (2002). Whole

Re: [Freesurfer] editing topological defect

2017-02-28 Thread Shane S
Hi Antonin, Thanks a lot. Those links are very helpful for me! Cheers, S --  Shane Schofield On 26 February 2017 at 12:51:23, Antonin Skoch (a...@ikem.cz) wrote: Dear Shane, the "topological defect" in FreeSurfer jargon means that the estimated surface contains errors like "holes" or

Re: [Freesurfer] XL defect detected

2017-02-28 Thread Shane S
Thanks Doug, I will give it try and update you on it. S --  Shane Schofield On 26 February 2017 at 22:35:52, Douglas Greve (gr...@nmr.mgh.harvard.edu) wrote: Probably not. Probably you the cerebellum is still attached. You should check the wm.mgz volume. On 2/24/17 11:21 AM, Shane

Re: [Freesurfer] Overestimation of volume in Hippocampus

2017-02-27 Thread Shane S
for the hippocampus. Sincerely, Michel Hu Van: freesurfer-boun...@nmr.mgh.harvard.edu <freesurfer-boun...@nmr.mgh.harvard.edu> namens Shane S <shane.schofi...@yahoo.com> Verzonden: maandag 27 februari 2017 11:00 Aan: Freesurfer support list Onderwerp: Re: [Freesurfer] Overestimati

Re: [Freesurfer] Overestimation of volume in Hippocampus

2017-02-27 Thread Shane S
Hi Michel Hu, Is that a summed value of left and right hippocampus? That seems normal to me since averaged total hippocamppal volumes for MCI have been typically reported at around 2500-3500mm3. Thanks, --  Shane S On 27 February 2017 at 09:44:27, Michel Hu (a...@live.nl) wrote: Dear