Dear FSL users,
I have obtained hippocampal volume by FSL FIRST.
I would like to adjust for head size and I have obtained WM volume, GM volume and CSF volume by VBM because I would like to use ICV(WM+GM+CSF) or TBV(WM+GM) .
But there is a problem.
I checked the correlation between ICV(WM+GM+CSF) and the vscaling factor obtained by SIENAX. The correlation coefficient was 0.8.
I think this is not good.
I would like to know why this discrepancy occurs.
Any suggestion would be highly appreciated.
Thank you so much,
Naoki Hirabayashi
|