Dear experts,
I am currently acquiring fMRI data using a TR of 2038 ms (as fast as
possible on the scanner which I am using). Before starting my study I
ensured that SPM accepts a TR of 2.038 s in the specification of the design.
However, now I see in the "statistical analysis: Design" window that is
shown after the specification that the Interscan Interval reported is 2.04 s.
Thus I was wondering what is the real value used during the analysis, and I
am a little bit confused. On the one hand, although the difference is small
it might become relevant when concatenating several sessions, as I had
planned to do. On the other hand, since the units for my design are seconds
rather scans maybe this simply does not matter.
If the value used is by default approximated to 2.04s, is there a file where
I can modify this setting, somewhere in the SPM folder?
Many thanks in advance for any suggestions,
best wishes,
nicola
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Nicola Canessa, Ph.D.
CRESA, www.cresa.eu
San Raffaele Research Institute,
Via Olgettina 58,
20132, Milano, Italy
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+39-02-2643-4419
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