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