Thank you!
So the average of the 'tpattern' values is the default reference time.
But I am not sure what is the exact meaning of "the average of the 'tpattern' values".
The timing correction code is :

3dTshift -tpattern seq-z -quintic -prefix pb01.sub1.r01.tshift pb00.sub1.r01.tcat+orig

And the TR is 2 s in my experiment.
So I guess the average of the 'tpattern' values is 1 s?
I don't know whether I have guessed right.
But this seems to be not so reasonable.
Take the example in the usages of 3dtshift for example:

                 slice number
tpattern    0   1   2   3   4    
   --------- --- --- --- --- ---   - 
   altplus     0 600 200 800 400   
   alt+z2    400   0 600 200 800    
   altminus  400 800 200 600   0    
   alt-z2    800 200 600   0 400    
   seqplus     0 200 400 600 800   
   seqminus  800 600 400 200   0

All the averages of the tpatterns listed above are 400 ms. That doesn't make sense because all the default references are same though the tpatterns are different.

Your reply will be highly appreciated!



Edited 5 time(s). Last edit at 10/18/2018 04:18PM by Zhang Yu.