Hi Ana
it can depend on your manual tracing protocol. For example: are fimbria/alveus part of your definition of hippocampus? For us they are.
cheers Bruce
On Tue, 2 Oct 2012, Ana Arruda wrote:
Dear experts,
About the differences between FSL and Freesurfer, I've noticed that the left-hippocampus volumes measured by Freesurfer are always bigger than the left-hippocampus volumes measured by FSL. Is there any reason that can explain that?
According to the literature, the percent volume difference between Freesurfer and manual tracing for left-hippocampus is always smaller than the percent volume difference between FSL and manual tracing and in my case, it happens exactly the opposite.
Would you mind helping me?
Thank you for your attention,
Ana Arruda