How does MRI compare to other techniques (e.g. CAT scans) for general diagnostics? Does it make sense to be used as a more routine diagnostics tool if there are

How does MRI compare to other techniques (e.g. CAT scans) for general diagnostics? Does it make sense to be used as a more routine diagnostics tool if there are many more machines available? In the US there are 37 MRI machines per million population, even in other relatively rich countries like France this is much lower at 14 per million population [0]. Is it just the cost of the machines, or are there drawbacks that limit their use as general purpose diagnostics tools? [0] https://www.statista.com/statistics/282401/density-of-magnetic-resonance-imaging-units-by-country/ https://www.statista.com/statistics/282401/density-of-magnet...