Use SPM12 (no idea which version you used) and make sure the alignment is approximately correct before you begin (Check reg with the MNI images released with SPM12).

Best regards,

-John

From: SPM (Statistical Parametric Mapping) <[log in to unmask]> on behalf of Abby tang <[log in to unmask]>
Sent: 15 April 2019 08:41
To: [log in to unmask]
Subject: [SPM] Skull removal error

Hello.

I have met something wrong when I use SPM> PET&VBM> segment.

I attached the pictures blow.

Can you help me and give me some advices in detail.

Thank you!