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

History of AFNI updates  

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Jim Bjork
January 27, 2005 11:08AM
Hi Rick,

I guess my question really boils down to: what is happening to the data in a slice itself when it is "shifted?".

Does this mean that when a slice is time shifted, the data in each voxel are re-written with an interpolated value that incorporates the values obtained for that voxel in the previous and subsequent aquisitions in some sort of trend analysis?

Alternatively, do the data values in the slice remain as they were in each voxel, only the "shifting" occurs when timing of events/blocks is convolved with the voxels in that slice-- i.e. events in time are appropriately shifted relative to when that slice was actually measured.

Please illuminate, thanks!

Jim
Subject Author Posted

Accomodating sequential slice acquisition and 3dTshift

Jim Bjork January 26, 2005 03:51PM

Re: Accomodating sequential slice acquisition and 3dTshift

rick reynolds January 26, 2005 04:21PM

Re: Accomodating sequential slice acquisition and 3dTshift

Jim Bjork January 27, 2005 11:08AM

Re: Accomodating sequential slice acquisition and 3dTshift

Robert Cox January 27, 2005 11:29AM