Estimating respiratory cycle from fMRIprep derivatives

Hi preppers,

This is more of a mild curiosity I had. We have run fMRIprep on a dataset of aging participants scanned without any physiological monitoring. I was curious whether there is any precedent for estimating the participant’s respiration from any of the fMRIprep confounds, many of which I know are intended to represent respiratory or cardiac activity. If anyone has any leads, please let me know.

Thank you,

Depending on the TR and other acquisition parameters, you may be able to “read” the respiration straight from the motion regressors, such as MVPA Meanderings: yet more with respiration and motion regressors. I find this easier to see in the 6 separate parameters rather than a combined FD-type measure.

Thank you for the link! Your blog is super readable and comprehensive. I’ll take a look into my data and see if the acquisition parameters are amenable to “reading” the respiration from the motion regressors.