Not sure about #1 and #2, and #4 depends on those. For #3, the age
Variable will regress out age. The time diff variable will regress out
the effect of duration.
On 1/21/2022 8:19 PM, Zeng, Qi wrote:
External Email - Use Caution
Hi,
I got a couple of questions regarding group analysis of tracula with a
longitudinal pipeline, freeview output heatmap key, and pair
analysis's fsgd & correction analysis.
1). I followed FsTutorial/TraculaStatistics - Free Surfer Wiki
(harvard.edu)
<https://secure-web.cisco.com/1AjTV10_qUpg01X4rpJJaZQufhlsihHV7tqqL_DCJ36KH6k7Wfn7vYMQ_mXIzud-Z0lklhortWCKXqcp00VfxtQV3b4LbuWYo_Qm86AtmvKLNntp1KNg-tQWyqI1QVhdJGtF3z2rTuFK4-tJN1bapt0wxmH3ZcQ8NiRaMmNk9I1oAuXJ0WZAmPJy8hbRkbkrSeMPkuuIQhR3Qkwnf6E0-fp5N2dq7Yrb4O1wCnRbH4xxNLhKV2RmmrIb4qnAsgAEscZcib4evSWCSDZW-szogaNSDcMecU8mqCokZpSCuq02Mj1JItqTCcB44fW0wW3oOqxigHLALajCRCViUORjm3w/https%3A%2F%2Fsurfer.nmr.mgh.harvard.edu%2Ffswiki%2FFsTutorial%2FTraculaStatistics> to
conduct a GLM group analysis for tracula results. But for the first
step, should I conduct a long_mris_slopes to get the rate of change
just as surface-based analysis for a longitudinal pipeline?
2). I tried freeview my sig.mgh results both for positive and negative
for my surface group analysis, is there a heatmap key I can put into
the image or available to export?
3). I created the FSDG file for pair analysis as follows to indicate
both the same and difference within the pair subject to hope to
regress out the effect of age at baseline and time_diff between
subjects, is that the correct way of formatting? and also how to
create the subject name here if my previous FSDG
is sub01_ses-1.long.sub01_base and sub01_ses-2.long.sub01_base for the
subject name.
> GroupDescriptorFile 1
> Class Main
> Variables Age_bl Time_diff
> Input sub01pair Main 30 7.1
> Input sub02pair Main 40 2.2
> Input sub03pair Main 50 3.7
> Input sub04pair Main 60 0.7
4). Even not indicated in the pair analysis page, a cluster correction
"mri_glmfit-sim" is also necessary for the last step, right?
Thank you so much!
Best,
Qi
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