Handling real / imaginary fieldmap pair for BIDS

Hi all,

I have a dataset acquired with GE Discovery MR750. They are in DICOM format and I’m planning to convert them into BIDS using dcm2bids. The fieldmaps of the dataset are 4 pairs of real/imaginary images, each pair representing a different TE. For example:
xxxx_e1_imaginary.nii
xxxx_e1_real.nii
xxxx_e2_imaginary.nii
xxxx_e2_real.nii
xxxx_e3_imaginary.nii
xxxx_e3_real.nii
xxxx_e4_imaginary.nii
xxxx_e4_real.nii

How should I specify them in the config file? Do I have to convert them first into magnitude and phase images prior to dcm2bids? (I’m using dcm2bids 2.1.9).

Thank you in advance for your help!

Hi @Jeni

I think what you are looking for can be find following this link:
https://bids-specification.readthedocs.io/en/stable/appendices/entities.html#part

Hope it helps

Best,
Arnaud

1 Like