Motion-BIDS for MRI

[JuliusWelzel]

Your idea

Hi,

Many MRI researchers have approached me about the Motion-BIDS specifications. They would like to know if the motion from a subject could also be expressed as motion data in BIDS. As I have not worked with an MRI before, I could not tell, but I wanted to know if some MRI people could help us include this in the specifications.

[Remi-Gau]

https://bids-specification.readthedocs.io/en/stable/modality-specific-files/physiological-and-other-continuous-recordings.html#recommendations-for-specific-use-cases

Maybe worth adding a note and a link to this in the motion page ?

[Remi-Gau]

Also note that if the motion data was computed after acquisition it goes into deiratives:
https://bids-specification--519.org.readthedocs.build/en/519/derivatives/functional-derivatives.html#motion-related-time-series

[Remi-Gau]

Not sure if we should care about anything related to storing motion computed for prospective motion correction in MRI scanner. I think those are mostly used for structural MRI AFAIK.

[JuliusWelzel]

Maybe worth adding a note and a link to this in the motion page ?

That is a good point, thanks. Do you know the leads for the MRI or would the maintainers review such a PR for the website?

Regarding storing it as derivatives, would it be stored in an extra directory but using the same layout as raw motion data?

    sub-<label>/
        derivatives/
           motion/
            <source_entities>[_desc-<label>]_motion.tsv
            <source_entities>[_desc-<label>]_motion.json