Hi Chris, 

I cropped the FOV and set the origin to the center of the cropped volume, but this did not help significantly (only 18 cases were fixed, the remaining 90 more still unresolved). I have attached one of the cropped images for your reference.

Additionally, I noticed that after defacing, the voxel values were altered even in areas outside the deface mask, such as the brainstem. Did the algorithm use any normalization or noise filtering that could impact the voxel values across the entire image?

Best,
Du