Dear Pierre,

The QC&QA manual is extremely helpful, and I could made the centering surgery on the header files of the anatomical scans thanks to the manual.
I'm using NYU "Classic" TRT dataset, for me it's a bit surprising that you told me that you haven't had any problem to run the preprocessing pipeline for the dataset:
If you have done it without any centering surgery, I'm wondering what's the difference between what you've done and mine. 
Since there were indeed significant centering problems in most of the subjects.

Best,
Kangjoo