AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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Peng Ren
January 17, 2019 04:07AM
Dear,

There are two terms called grid and grid spacing, which makes me confused. I found it when using adwarp command with -dxyz option. Here are the situation: 

anat+tlrc: voxel size=2x2x2, grid=91x109x91
epi+orig: voxel size=3.312x3.312x3.312, grid=64x64x48
epi+tlrc: voxel size=3.312x3.312x3.312, grid=64x64x48

As far as i know, grid spacing should be the spacing between grid lines in voxels, am i right?
However, it makes no difference on the grid of epi after using -dxyz=3 in adwarp command, would you mind giving me some idea?

Yours,
Peng
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Subject Author Posted

Where's grid spacing information in header of NIFTI image file?

Peng Ren January 17, 2019 04:07AM

Re: Where's grid spacing information in header of NIFTI image file?

rick reynolds January 17, 2019 09:10AM

Re: Where's grid spacing information in header of NIFTI image file?

Peng Ren January 18, 2019 01:39AM

Re: Where's grid spacing information in header of NIFTI image file?

rick reynolds January 18, 2019 09:04AM

Re: Where's grid spacing information in header of NIFTI image file?

Peng Ren January 18, 2019 09:26PM

Re: Where's grid spacing information in header of NIFTI image file?

rick reynolds January 22, 2019 09:04AM