Estimate respiration signal from phase data

[tsalo]

What would you like to see added in fMRIPost-Phase?

We might be able to get a reasonable estimate of subject respiration from the phase data, based on Jaffray et al. (2024).

Do you have any interest in helping implement the feature?

Yes

Additional information / screenshots

This method requires a fast TR ("TR must be shorter than half of the shortest respiration period") so we might need to check the TR against the expected breathing rate.

From the paper:

The mean of the respiratory period measured across all subjects using the proposed method was 4.79 seconds ± 1.6 seconds, and the mean measured with the breathing belt was 4.79 seconds ± 1.6 seconds.

[tsalo]

Other papers that touch on this are Cheng & Li (2010), Bancelin et al. (2022), and Van et al. (preprint). It looks like Andrew Van's MEDIC pipeline will produce field maps that can be used for this from multi-echo data.