Dear all,
I am running the Human Connectome Project preprocessing pipeline with data in BIDS format, acquired with a General Electrics scanner. For the PreFreesurfer pipeline I need to provide the “UnwarpDir” parameter. To my understanding this is the frequency encoding direction of the T1 and T2 images.
I know:
“InPlanePhaseEncodingDirectionDICOM”: “ROW”
“ImageOrientationPatientDICOM”: [0, 1, 0, 0, 0, -1]
I understand that of the image orientation vector, the first triplet [0,1,0] defines the row orientation and the second triplet [0,0,-1] the column orientation. Am I then correct in assuming that the frequency encoding (and therefore the “UnwarpDir”) is “z” in this case?
Thank you!
Best,
Thomas