It seems like you would want to convert the maps to % BOLD. Iąd also be
interested to hear the recommended way to do that.
Peace,
Matt.
On 5/10/15, 5:36 PM, "Sam Choi" <[log in to unmask]> wrote:
>Hi FSLers,
>
>I apologize in advance for my elementary question.
>
>I ran MELODIC and dual regression with my resting state data set. Now,
>I'm interested in measuring the strength of the functional connectivity
>within a resting state network. Unfortunately, I haven't really seen any
>post on this forum that discusses how to obtain this strength value.
>Would the following steps be correct?
>
>1) Use fslsplit on our IC of interest from dual regression stage 2 (e.g.,
>dr_stage2_ic[#ICA].nii.gz) in order to get a subject-specific RSN map
>corresponding to our IC of interest.
>
>2) Take the melodic_IC.nii.gz file and run fslsplit to get the group mean
>RSN map corresponding to our IC of interest. Then, binarize the group RSN
>map since we just want a mask of the group RSN.
>
>3) Finally, run fslmeants (i.e., fslmeants -i
>dr_stage2_ic[#ICA]_subjX.nii.gz -o strength.txt -m
>melodic_IC#_bin.nii.gz) for the mean value as a measure of network
>strength.
>
>As a related question, are there no units to the strength value? And, are
>there a range of values for functional connectivity strength?
>
>I appreciate any advice you may have. Thanks for your help!
>
>Sam
|