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  

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September 18, 2012 03:05PM
> There's already some
> smoothness in your original data, so blurring it
> further will give you a smoothness that is higher
> than the size of your smoothing kernel.

Is that true without exception? I used
-- 3dmerge -1blur_fwhm to blur datasets with FWHM values of 4, 6, 8, 10 and 12 mm (in parallel to compare the effect of the different FWHM values),
-- 3dDeconvolve to reduce the influence of nuisance variables and
-- 3dFourier for temporal filtering, and afterwards
-- 3dFWHMx estimated the resulting FWHM values as 6.2, 7.5, 8.6, 9.2 and 9.2 mm.

Is it because of the order of the preprocessing steps? I tried to follow the recommendations of Weissenbacher et al. (2009; Neuroimage). As I am most interested in the 8mm blurring, I am happy with the increase to 8.6. But what if I wanted to report the results of blurring with 12mm?

Many thanks to the AFNI team for their wonderful programs and their friendly and generous help!

Wolfram
Subject Author Posted

3dFWHM and AlphaSim

Michael Amlung August 09, 2012 12:55PM

Re: 3dFWHM and AlphaSim

nick August 09, 2012 02:19PM

Re: 3dFWHM and AlphaSim

Wolfram September 18, 2012 03:05PM

Re: 3dFWHM and AlphaSim

rick reynolds September 18, 2012 08:58PM

Re: 3dFWHM and AlphaSim

Wolfram September 19, 2012 11:05AM

Re: 3dFWHM and AlphaSim

rick reynolds September 19, 2012 09:17PM

Re: 3dFWHM and AlphaSim

Laurel September 20, 2012 05:14PM

Re: 3dFWHM and AlphaSim

rick reynolds September 20, 2012 09:03PM

Re: 3dFWHM and AlphaSim

JoshPowell September 21, 2012 11:49AM

Re: 3dFWHM and AlphaSim

rick reynolds September 21, 2012 02:04PM

Re: 3dFWHM and AlphaSim

JoshPowell September 26, 2012 03:07PM

Re: 3dFWHM and AlphaSim

rick reynolds September 26, 2012 03:36PM

Re: 3dFWHM and AlphaSim

JoshPowell October 03, 2012 03:13PM

Re: 3dFWHM and AlphaSim

rick reynolds October 03, 2012 09:11PM

Re: 3dFWHM and AlphaSim

nick September 21, 2012 02:08PM

Re: 3dFWHM and AlphaSim

rick reynolds September 21, 2012 02:47PM

Re: 3dFWHM and AlphaSim

rick reynolds September 21, 2012 03:18PM

Re: 3dFWHM and AlphaSim

Wolfram September 24, 2012 10:14AM

Re: 3dFWHM and AlphaSim

rick reynolds September 25, 2012 08:35AM

Re: 3dFWHM and AlphaSim

Wanyong February 11, 2013 01:25PM