Next, perform temporal alignment using 3dTshift.

• Next, perform temporal alignment using 3dTshift.

• • Slices were acquired in an interleaved manner (slice 0, 2, 4, …, 1, 3, 5, …).
  • Interpolate each voxel's time series onto a new time grid, as if each entire volume had been acquired at the beginning of the TR (TR=3 seconds in this example)
  • • For example, slice #0 was acquired at times t = 0, 3, 6, 9, etc., in seconds. However, slice #1 was acquired at times t = 1.5, 4.5, 7.5, 10.5, etc., which is asynchronous with the TR.
    • After applying 3dTshift, all slices will have offset times of t = 0, 3, 6, etc.

• 3dTshift -tzero 0 -quintic \

• -prefix pb01.$subj.r$run.tshift \

• pb00.$subj.r$run.tcat+orig

• • • -tzero 0 : the offset for each slice is set to the beginning of the TR
    • -quintic : interpolate using a 5th degree polynomial