I think it should work for b0 images, but I would avoid using any frames
that have a gradient. Note that you will need about 10 images to compute
the fwhm using mri_fwhm (also make sure you use a mask)
On 8/30/2022 1:33 PM, Igor Nestrašil wrote:
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Dear
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Dear FreeSurfer developers,
Can "mri_fwhm" be used to estimate FWHM of b0 images (obtained from
diffusion-weighted echo-planar sequences) and is it possible to employ for
FWHM estimation from aligned diffusion-weighted images of the same b-value
Hi FS experts,
I am trying to use the folowing command:
mri_fwhm --i lh.mgh --auto-mask 0.2 --sum lh.fwhm5.sum --fwhm 5 --o lh_5mm.mgh
I keep receiving an error message as follow:
voxelvolume 1 mm3
Computing mask, relative threshold = 0.2, gmean = 0.501858, absthresh = 0.100372
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