> I think the main reason people aren't scanned routinely is due to the enormous cost of the scanning and the data analysis that currently relies on physicians for interpretation.

The main reason is that doctors and regulators warn against it because, as patent says, people are chock full of scars and lumps and stuff that shows on scans but that is not in anyway harmful.

http://news.bbc.co.uk/1/hi/health/7150583.stm

> "If 100,000 people undergo a CT scan every five years from age 40 to 70 years...then the estimated impact is approximately 240 excess fatalities."

Although that's talking about CT, not MRI, scans.