Full-body MRIs are all the rage. We take a look at three major companies offering such testing.

Add Yahoo as a preferred source to see more of our stories on Google. Full-body MRIs promise to help detect cancer and other issues early. But they can also be expensive and unneeded medical tests.

Full-body MRIs promise to help detect cancer and other issues early. But they can also be expensive and unneeded medical tests. Doctors gave us a good framework for assessing whether a full-body MRI ...