abcd-hcp-pipeline
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Allow for lack of ImageOrientationPatientDICOM
ImageOrientationPatientDICOM and InPlanePhaseEncodingDirectionDICOM are used in conjunction to get the readout direction of a subject.
These are probably exclusively put in by dcm2bids, and we should allow for two cases:
one, change the logic in the pipeline so these fields are only used when a fieldmap is present. two, allow for an explicit readout direction input, as in the original HCP bids application.