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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Zhang Yu
October 06, 2018 05:03AM
Hi Rick,
Thank you!
The only different fields are ‘pixdim’ and 'slice_duration' if I choose some other EPI files for comparison: 
nifti_tool -diff_hdr -infiles ver1.nii ver2.nii
name                offset  nvals  values
  ------------------- ------  -----  ------
  pixdim                76      8    1.0 1.5 1.5 1.49995 4.0 0.0 0.0 0.0
  pixdim                76      8    1.0 1.5 1.5 1.49995 2.0 0.0 0.0 0.0
  slice_duration       132      1    0.05
  slice_duration       132      1    0.0762
I also tried Dimon. The outputted pixdim is '1.0 1.5 1.5 1.49995 2.0 0.0 0.0 0.0' and the slice_duration is '0'.
Then I tried 3dWarp and 3drefit to modify these nii files. Some brik files were generated.
I want to know whether 3dWarp and 3drefit work well.
Do you know how to display header field diffs between two brik datasets?
Yu
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Subject Author Posted

Can the wrong values in these fields of NIFTI files affect the preprocessing results in AFNI?

Zhang Yu September 28, 2018 09:52AM

Re: Can the wrong values in these fields of NIFTI files affect the preprocessing results in AFNI?

rick reynolds October 04, 2018 06:54PM

Re: Can the wrong values in these fields of NIFTI files affect the preprocessing results in AFNI?

Zhang Yu October 06, 2018 05:03AM

Re: Can the wrong values in these fields of NIFTI files affect the preprocessing results in AFNI?

rick reynolds October 11, 2018 09:15AM