Spinal cord MRI generic protocol using BIDS convention

[julien.c...@gmail.com]

Hi,

I am leading an initiative to harmonize spinal cord MRI protocols across vendors. When providing the sequence import files (which will be made publicly available via osf.io), we would like to follow the BIDS convention for sequence naming. Could you please let me know if the following protocol sounds BIDS-compatible? For each scan, the symbol ":" separates the BIDS name (on the left) from the vendor-equivalent sequence (on the right).

- T1w: IR-FSPGR/BRAVO (GE), 3D TFE (Philips), MPRAGE (Siemens)
- T2w: FIESTA-C (TrueFISP with dual excitation, GE), VISTA (Philips), SPACE (Siemens)
- GRE-MT1: SPGR (GE), FFE (Philips), GRE (Siemens)
- GRE-MT0: SPGR (GE), FFE (Philips), GRE (Siemens)
- GRE-T1w: SPGR (GE), FFE (Philips), GRE (Siemens)
- DWI: FOCUS (GE), Zoom Diffusion (Philips), ep2d_diff ZOOMit (Siemens)
- GRE-ME: MERGE (GE), mFFE (Philips), GRE (Siemens)

Please note that "MT" refers to magnetization transfer, and "ME" refers to multi-echo.

Thanks,
Julien

[Chris Gorgolewski]

Hi,

Currently this is a bit of a mess in BIDS so cleaning this up would be a great idea. Some questions (please bare my lack of deep knowledge of MR physics):

1) What is the difference between T1w and GRE-T1w? Should those be in two groups?

2) How would you categorize the following sequences: FLAIR, FLASH, MP2RAGE

Best,

Chris

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