Thank you, Chris, for explaining those details.

In my initial run, I used raw DICOM data, and most of the cases failed. Specifically, in example case 4, the face and ear mask showed very high intensity, and in case 5, the template face was applied to the wrong area. I've since converted the DICOM to NIfTI and cropped the image to focus only on the head.

I've uploaded the original DICOM for one sample case where the defacing result has a similar issue to example case 4.

Please let me know if you have any suggestions for the above two issues. 

Best,
Du