I don't think there is a justification really. You might just find some other pubs that use the same amount, but that is not a justification either. doug
On 09/24/2013 11:44 AM, Tara Ann Miskovich wrote:
Thank you so much for your help. The fwhm of 0 and 5 both work. I was wondering if you knew of any references or sites I could reference to justify this level of smoothing.
Tara
----- Original Message ----- From: "Marie Schaer" Marie.Schaer@unige.ch To: "Douglas N Greve" greve@nmr.mgh.harvard.edu Cc: "Nick Schmansky" nicks@nmr.mgh.harvard.edu, freesurfer@nmr.mgh.harvard.edu Sent: Wednesday, September 4, 2013 10:36:14 AM Subject: Re: [Freesurfer] Monte Carlo Simulation in Qdec
Hi Tara, You can try with fwhm=0 as Doug suggested, or 5 if it works. I'm still trying to see whether the level of fwhm could be modified in qdec so that you can input your own level (e.g. 1 or 2, instead of the specified 0-5-10-15-20-25).
Nick, Do you know if there is a keyword that can be changed in .Qdecr to add different smoothing values to the FWHM menu in Qdec?
Thanks!
Marie
On Sep 4, 2013, at 8:03 AM, Douglas N Greve greve@nmr.mgh.harvard.edu wrote:
Hi Tara, The problem is that the lGI is already very smooth and then it gets smoothed again. This causes the total smoothness level to go beyond what has been done for the simulation. Try using fwhm=0.
doug
On 09/04/2013 09:48 AM, Tara Ann Miskovich wrote:
Hello,
I am conducting group analyses with LGI data in qdec, and I am having an issue with the monte carlo simulation I am hoping to get help with.
Under design I leave the Smoothing (FWHM) at 10, and when I try to run the monte carlo simulation after running the analysis I get this error: Error in Monte Carlo simulation: Error running mri_surfcluster. Plus in the terminal I get an error: mri_surfclusterfwhm.dat: 37.226284, rounded to 38 Error: fwhm out-of-range (< 1 or > 30)!
Should I be using fwhm0 for LGI data?
Thank you for your help!
Tara _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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