Hi, I have a couple of questions regarding Fsl-vbm and First. The scans we
have been using for both have some signal loss superiorly and inferiorly.
Due to this we do not get a good extraction with Bet (brain is excluded top
and bottom). We have been dealing with this issue by correcting for the
bias field with Fast and have gotten good results. Since Fsl-vbm applies
Bet we have entered bias-corrected scans into our Vbm analyses. However,
will this cause problems when segmentation is done in fslvbm_2_template (or
anywhere else in Fsl-vbm)?
Also, is it best to use the bias-corrected scans in First as well? It seems
possible that not correcting scan intensities for the bias field will
interfere with the identification of structures (since First uses
intensities in this process), thanks,
Jeff
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