Nobody or no item is getting an MRI at an airport. It's pretty common for people to conflate that with X-rays but MRIs work on a fundamentally different process and exclusively (outside of physics 101) requires liquid helium-cooled superconducting magnets to get anything useful.

There are an order of magnitude less MRI scans daily than US flight passengers, however, at 1/30th the frequency.

Granted, I imagine an MRI scan still takes longer than 30 airport scans.

Interestingly the price of the body scanners and a typical MRI are in the same ballpark, from my experience and what I could glean online.