These figures are misleading. Hospitals use the equivalent of a random number generator to decide how much to charge for an MRI, but the only important number is what they are actually paid. The unpaid balance is written off (except for the rare patients who are paying out of pocket).
It’s hard to know what insurance companies pay, but they generally bargain for something similar to what Medicare decides to pay.
What Medicare pays is public knowledge, though it’s a little difficult to actually decipher.
First you determine the CPT code for the procedure. For unenhanced lumbar spine MRI, possibly the most common MRI study of all, the CPT code is 72148.
Then you can look up the reimbursement for that CPT code at cms.gov. This is typically broken down into technical and professional components, which go to the owner of the machine and the radiologist respectively. There are various modifiers depending on geography, inpatient vs outpatient, etc. Still, a rough estimate would be $200-$300 total. Figure $400-$600 for an enhanced brain MRI (70553), which is another very common exam with contrast injection driving up the payment. I would estimate that those two exams, by themselves, make up 25-50% of all MRI scans.
Chest xrays, among the most common xray studies, will generally be reimbursed under $50. Screening mammography (G0202), another very common xray, is reimbursed at $100-$200.
BTW, there are CPT codes for all procedures, not just radiology scans. Colonoscopy is 45378, botox injection is 64612, wart removal is 17110, etc.