It seems like the radiology equivalent to a blood testing machine that could be deployed to walgreens and detect 100 diseases with a finger prick.
True, but on the other hand they have an actual prototype and they don't seem to be going around charming VCs... also, I didn't see anywhere they claimed to be able to diagnose or discover any disease.
So as opposed to bilking the ultra-wealthy to invest in a bunk idea, at worst this seems to be enticing them to pay for an at-worst expensive and possibly useless service. On that scale, it's downright ethical.
But they're bootstrapped and using their own money, not defrauding investors