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

History of AFNI updates  

Previous Message Next Message
Message List New Topic Print View
|
Maria
May 14, 2012 05:35PM
Hello,
I have a question about analyzing data from an event-related sparse sampling protocol. The TR is 7 s but the first 3 s are volume acquisition and the remaining 4 s are speaking. So, if I have 50 TRs and the hemodynamic response is about 6 seconds, then the response from the first stimulus (first TR) is captured in the volume of the second TR, that is the following TR and so on. I am wondering how to handle the last TR in a run, e.g., TR 50, that may have a stimulus but is not followed by a volume acquisition. Is that a problem? In fact, we acquire a couple more volumes after the very last experimental TR that just say "rest". Should I include a TR 51 just to capture the response from TR 50?
I hope this makes sense.
Maria
Reply Quote
RSS
Subject Author Posted

event-related sparse sampling design

Maria May 14, 2012 05:35PM

Re: event-related sparse sampling design

rick reynolds May 15, 2012 12:45PM

Re: event-related sparse sampling design

Maria May 15, 2012 01:13PM

Re: event-related sparse sampling design

rick reynolds May 15, 2012 03:19PM

Re: event-related sparse sampling design

Maria May 15, 2012 04:16PM