AFNI Message Board

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

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Craig Stark
January 09, 2004 11:18AM
teodora wrote:

> In our experiment 1TR= 10 seconds.
>
> I wonder if we use subTRs to deconvolve the signal (e.g
> stim_nptr 1 10) 1 LAG is expressed in terms of TR or SUBTRs (1
> lag = 10 seconds or 1lag=1 second)?

Are you 100% sure that the TR is 10 seconds and it's not that the trial length is 10s but multiple 3D volumes were acquired in that 10s? If your trial length is 10s and you had, say, 2s TRs, life would be good. If your TR is really 10s, your MRI signal is going to have a heck of a lot of T1 in it and not really be a BOLD signal.

Craig
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Subject Author Posted

About Lags

teodora January 08, 2004 02:35PM

Re: About Lags

Gang Chen January 08, 2004 04:11PM

Re: About Lags

teodora January 09, 2004 08:46AM

Re: About Lags

Craig Stark January 09, 2004 11:18AM

Re: About Lags

teodora January 13, 2004 01:54PM