QuNex Functional Stream Configuration Question

Hi all,

I’m using the QuNex system to run the HCP Minimal Processing Pipeline for functional data. I’m having a difficult time parsing their configuration options. In particular, I can’t figure out how to point the system to the field maps associated with the BOLD acquisition. These are the options in question:

–hcp_bold_sephasepos … Label for the positive image of the Spin Echo Field Map pair []
–hcp_bold_sephaseneg … Label for the negative image of the Spin Echo Field Map pair []

Has anyone used this system before? What exactly do they mean by ‘label’? Do ‘positive’ and ‘negative’ refer to having the same vs. opposite phase encoding direction as the BOLD image?

I appreciate any help anyone can provide.

Thank you,