This is a preliminary question for a problem I have to solve a little down the road, but I wanted to start by gathering some information. I optimally want all my runs from my fMRI scans to have a TR of 1 second. However, I have multiple scans in which the TR was set at less than 1 second. I was wondering if there was a post hoc way to change my TR time. Any light shed on the subject would be helpful.