I would like to use BIDS format for common preprocessing (e.g. using fmriprep), however with data from a GE scanner (Signa HDxt), I could not get any of the following fields (among others) with dcm2niix (including latest version I compiled myself at the time of writing):
I could manually get EffectiveEchoSpacing by looking at DICOM field 0043 102c (cf GE doc) and SliceTiming by looking at DICOM field “Trigger Time”.
I could compute TotalReadoutTime with (<DICOM field “IMG Columns”> - 1) * (1 / EffectiveEchoSpacing).
However I could not find a way to get BandwidthPerPixelPhaseEncode (the DICOM field “ACQ Pixel Bandwidth” seems to be something different) and could only get part of the PhaseEncodingDirection: the direction but not the sign (direction was “j” as DICOM field “ACQ Phase Encoding Direction” was ROW).
Any help on getting from GE DICOM images all the parameters required for standard resting state and diffusion MRI preprocessing (especially slice time correction, fieldmap-based correction, and use of FSL eddy) would be great.