Hi, FSL experts.
I was confused by following the questions.
1.Using FIRST package, I tried to make group analysis in patients vs normal
controls. I found there was group difference in left amygdala and other
structures. I tried to visualize the difference using vtk by my self. In the
uploaded figure, I showed the left amygdala using vtk and fslview
respectively. To my surprise, they are different. It seems to me that my result
is a mirror image of the result obtained using fslview. In addition, the result
obtained using fslview is smoother. Since I loaded the same
NS_L_Amyg1_Fthresh.vtk file, why are the different in that way?
2.In addition, there are arrows which are tangent to the surface but the arrow
is still outside the surface or inside the surface.Can we say that it is atrophy if
the arrow lies inside the surface, no matter it is pointing inward or tangent to
the surface?
3.In order to correct registration errors, I used fslswapdim command. What is
the effect of fslswapdim? Should I take any additional steps when making
group analysis if I performed the fslswapdim command?
By the way, I have uploaded the pictures to http://www.fmrib.ox.ac.uk/cgi-
bin/upload.cgi. The six-digit reference number for this upload session is
555243.
Thanks a lot!
Hankee
|