Call your local hospital and ask what the wait time is for an appointment for a non-urgent MRI. If it's more than a week there is undersupply, not oversupply.
It's probably actually at least a month of waiting time.
Considering how these things usually get booked, on need with some leeway for emergencies, a week is the same as now. I am certain the "I'm in the hospital an need an MRI" waiting time is the same day and emergencies now. Your non urgent MRI is just not important enough so get planned far ahead to create a good average load.
There are some local fluctuations, but at far north suburbs of Chicago, where I used to live, I could get non-emergency scan the same or the next day. Bear in mind that oversupply produces overuse. Often times, the doctor ordering a scan is a direct or indirect investor in medical imaging facility. So waiting time alone may not be the best measure. Some patients wait for the scan they don't need.