[Freesurfer] Segmentation of hippocampus and amygdala: using an additional scan with low-pixel

External Email - Use Caution

Hello FreeSurfer Developers,

I am attempting a quality check for my segmentation using an additional scan. My segmentation of hippocampal subfields and nuclei of the amygdala using an additional scan were successfully done. However, I am not sure it is better to use an additional scan since its pixel density is low. I used a T1 image with 0.977*0.977*1(mm, x*y*z axis) pixel, and T2 FLAIR image with 0.688*0.688*6(mm, x*y*z axis) pixel. *Is it okay to use an additional scan having a big pixel size such as 6mm? Can I still say that the segmentation with the additional scan is more reliable than solely using a T1 scan?* I checked the outputs using freeview, but it was difficult to conclude.

1) Freesurfer version: freesurfer-linux-centos7_x86_64-7.1.0-20200511-813297b 2) Platform: Ubuntu 18.04 LTS

Thanks for your help.

Thanks. Sunah.