Hi,
I have a question very similar to one already asked by someone else,
but to which I could not find a reply:
Does slice timing have any bearing on how Microtime onsets should be
entered? I have an event-related design with 33 slices acquired
sequentially, my reference slice is 16, and my TR is 2. Should my
Microtime onset be 8 (16/33 * Microtime Res.)? I noticed in SPM Help
that they recommend not changing the default of 1 unless you have a
long TR. What should I make of this? Also, and perhaps this is a
separate issue from Microtime onset, should I adjust my vectors of
onset (in scan units) by .5 since I chose the middle slice as my
reference slice, or is all of that taken care of automatically by
SPM5? Thanks so much,
Ryan
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