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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Jatin Vaidya
March 30, 2010 12:04PM
Hi Bob,

Just a quick update...I tried the -2difMAD option on a PET image. For comparison, I also ran the analysis on one of my fMRI images (which represents, for one person, the beta weight for one condition of interest). According to 3dFWHMx, the PET image had a very large level of smoothing (22.5748 33.8648 14.3082). I was expecting something around 15-16mm on average given that I had applied a 12mm filter. But, given that PET data are inherently more smooth, this may make sense (and may even indicate that an additional 12mm level of smoothing is too much).

The fMRI image had a smoothness level in line with expectations (7.37775 7.36965 6.61553).

Thanks again for creating the -2difMAD option.

Jatin
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Subject Author Posted

Alphasim for PET data

Jatin Vaidya March 15, 2010 05:50PM

Re: Alphasim for PET data

bob cox March 16, 2010 02:23PM

Re: Alphasim for PET data

Jatin Vaidya March 16, 2010 05:59PM

Re: Alphasim for PET data

Jatin Vaidya March 23, 2010 10:34AM

Re: Alphasim for PET data

bob cox March 23, 2010 01:43PM

Re: Alphasim for PET data

bob cox March 24, 2010 03:33PM

Re: Alphasim for PET data

Jatin Vaidya March 30, 2010 12:04PM

Re: Alphasim for PET data

bob cox March 30, 2010 03:15PM