[Freesurfer] Cortical thickness map for a pediatric case

Dear team,

I have completed cross-sectional pipeline on my pediatric case with a baseline and 4 follow up time points between 4-7 years of age. However, I was not able to run longitudinal pipeline on it as the base template creation failed with some topological errors. I assume this failure is due to large eTIV changes within 4-7 years of age.

I wanted to compare cortical thickness map of follow-up time points to its baseline using qdec. However, I was not able to as running qdec with single subject failed with 0 dof error. Can you'll please suggest how can I generate cortical thickness map between follow-up and baseline scans for this subject if qdec is not an option.

Thanks,

Sneha