Hi,
I processed my images using SPM and obtained a statistical T-map.
I want to use 3dClustSim in AFNI to correct for FWE.
In order to get FWHM to put as an input to 3dClustSim, there are 2 alternatives:
1) Using SPM.mat
SPM.xVol.FWHM gives me 5.8062 6.3335 6.4607
2) Using AFNI
3dcalc -a ResMS.hdr -expr "sqrt(a)" -prefix sqrt_Res_MS.nii
3dFWHMx -mask MNI_2mm.nii -input sqrt_Res_MS.nii - output fwhm.txt
gives me: 9.36413 9.74247 8.29123
Which one should I pass in 3dClustSim?
Thanks
Regards
|