Show all posts by user
Dear AFNI users-
We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
https://discuss.afni.nimh.nih.gov
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
Sincerely,
AFNI HQ
History of AFNI updates
Page 1 of 1 Pages: 1
Results 1 - 3 of 3
Dear Rick,
No, it's indeed a single fMRI run with ~18 minutes continuous data acquisition. Actually this is a rather short one, there have been experiments with session lengths of up to 45 min at that scanner. Not sure whether scanner drift is the major drawback then, probably it's more of an issue for the subject, as 30 min can be very long without any indication from outside for ho
by
Helmut
-
AFNI Message Board
Dear Greg,
Thank you for the quick reply!
> No further manipulations are performed on the Legendre polynomials in AFNI.
Good to know, then I'll go with the default settings.
> the default cut-off value [...] is purely empirical
Yes. I think it's based on some very old fMRI study which relied on an event-related design, where there should indeed be no/hardly any signal w
by
Helmut
-
AFNI Message Board
Dear everyone,
I would like to rerun an SPM analysis with polynomial regressors accounting for slow frequencies instead of SPM's default high-pass filter. As there are different options (e.g. Legendre ones) I would like to rely on some established method, which made me come to AFNI. Unfortunately I have no experience with AFNI, thus a few questions. My session would be < 20 min, sugges
by
Helmut
-
AFNI Message Board