External Email - Use Caution This email was sent 22 hours ago, but somehow it haven't appeared on the forum yet. I post it again.
Gabor Perlaki <petzinger.ga...@gmail.com> ezt írta (időpont: 2021. jún. 2., Sze, 12:11): > The default talairach registration is wrong in ~20% of our subjects and > thus eTIV is also quite inaccurate (e.g. <1000 cc in certain cases). I > tried -use-mritotal which resulted in much more accurate talairach > registration. > My questions: > Q1, I think it's not a good idea to mix talairach_avi and mritotal > registrations in a single study, because they can consequently result in > different eTIV values or initialization parameters affecting the final > segmentations. Therefore it would be easier to run the whole analysis again > with mritotal as default rather than correcting the talairach registration > and rerunning the analysis in separate steps for each subject. Is the > following command OK for this purpose? > recon-all -s SUBJ -i input_dicom_file -use-mritotal -all > > Q2, Is mritotal only used to calculate talairach.xfm or are there any > other hidden analysis steps which may perform worse (even though > talairach.xfm is more accurate) when using it instead of talairach_avi? > > Q3, Is it more accurate to use sbTIV instead of eTIV? > > Thanks, > Gabor >
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