Freesurfer October 2021

freesurfer@nmr.mgh.harvard.edu

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113 discussions

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What does Freesurfer do with a T2 if you do not use the t2pial flag
by Aaron Tanenbaum 01 Oct '21

01 Oct '21

External Email - Use Caution What does Freesurfer do with a T2 if you do not use the t2pial flag?

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Color LUT after coregister and reslice aparc/aseg.nii
by Ryan Wales 01 Oct '21

01 Oct '21

External Email - Use Caution Hello, I'm using fmriprep's aparcaseg_dseg.nii (still FreeSurfer code, right?) to create ROI masks. I wish to coregister and reslice this segmentation file to match the native space for another image (PET), then extract SUVR values for each ROI. However, after coregistration, the lookup values are no longer faithful to their original values. Would there be a way to view or create a new color LUT that reflects that aparcaseg_dseg.nii map in a different space? Thank you, Ryan -- Ryan Wales (he/him), M.A. Ph.D. Candidate Integrative Neuroscience Psychology Department Stony Brook University E-mail: ryan.wales(a)stonybrook.edu <ryanwales(a)stonybrook.edu>

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unpacking Diffusion data
by Nasiriavanaki, Zahra,M.D. 30 Sep '21

30 Sep '21

Hello Freesurfers, I have 6 runs of DTI data per subject in a sample of 50, and I want to unpack the dicoms, so it outputs the bval bvec values, to use in dt_recon. I realized I can use either dcm2nii or mri_convert to do this. Could you please let me know what the command should be? and also should I do it separately for each run? subject’s scan info is attached. I used the below command in dev environment but didn’t get any bval bvec values. mri_convert /${subj}/IMAGES/IM01113 /${subj}/DTI/IM_13.nii Appreciate your help. Mona 1 Localizer ok 512 512 13 1 IM00269 2 SagT2FLAIRSPACE ok 512 512 176 1 IM00273 3 SagT2FLAIRSPACE ok 512 512 171 1 IM02084 4 SagT1MPRAGE1mmiso_P3 ok 256 256 176 1 IM00449 5 SagT2FLAIRSPACE ok 512 512 227 1 IM02311 6 SagT1MPRAGE1mmiso_P3 ok 256 256 171 1 IM02482 7 SagT1MPRAGE1mmiso_P3 ok 256 256 239 1 IM02721 8 AxWaveSWI ok 288 252 88 1 IM00793 9 AxWaveSWI ok 288 252 88 1 IM00881 10 AxWaveSWI ok 288 252 81 1 IM00705 11 AxWaveSWI ok 288 252 88 1 IM00969 12 Diffusion ok 990 990 1 70 IM00970 13 Diffusion ok 110 110 74 1 IM01113 14 Diffusion ok 110 110 74 1 IM01187 15 Diffusion ok 110 110 74 1 IM01261 16 Diffusion ok 110 110 74 1 IM01335 17 Diffusion ok 110 110 1 74 IM01336 Zahra (Mona) Nasiriavanaki, M.D. Postdoctoral Research Fellow Department of Psychiatry | MGH/HMS 149 13th Street, 149-2615 Boston, MA, USA, 02129

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Freesurfer October 2021