Dear SPM community,
We're currently using an EPI-sequence for our fMRI study, with a TR=3. However, it's set up to acquire all the slices as fast as possible during the beginning of TR and then "relax" for the remainder of the time (as opposed to equidistant acquisitions, where the slices are evenly distributed throughout the TR). We considered this to have the advantage of giving less problems with time distanses between slices, but could this pose a problem with regards to the way SPM handles the data, i.e. if SPM assumes equidistant acquisition? Also, could this be problematic for event-related designs?
We don't plan on using any slice time correction.