Tip: Alter ASL acquisitions for your population

- For the single-TI sequence, a shorter TI should be better for younger healthy populations. Keep in mind that the literature generally reports PLD (post labeling delay) which is *TI - Bolus Duration*. Thus, although the TI for this acquisition is 2800 ms, the PLD is 2100 ms (2800-700=2100).

- For the multi-TI sequence, a young healthy population would not need large TI values (like 3000 or 3260). It might also be worth dropping some of the very short TIs (e.g., 920 and 1180) in the multiTI sequence. They seem to be associated with artifacts, and it is unlikely that any population will actually have arterial transit times in this range.

ASL 4: ASL DICOMS to BIDS (1+ hours)