Dear FreeSurfer experts,

It has been a problem for me to fix this kind of issue, and am struggling to obtain the accurate data from it. 

I tried to edit wm.mgz as well as adding control points in attempt to expand the pial surface all the way up to the gyrus in temporal lobe. However, it only shows a tiny area calculated as pial surface in the right temporal lobe as shown below:

During the process of autorecon2-cp, I saw a message saying "An extra large defect has been detected... This often happens because cerebellum or dura has not been removed from wm.mgz." May I know where I can spot out the defect? 

Moreover, does it relate to the quality of images? 

Thank you.