If you look for problems, you will find them. Medicine is a science, but it's not an exact science, so something that's a problem in one person may be normal fo

If you look for problems, you will find them. Medicine is a science, but it's not an exact science, so something that's a problem in one person may be normal for another person. There are also so many external factors that go into a diagnosis and recommendation that a simple scan can never give the whole story. Most often doctors do tests just because they can bill for them and it increases the amount of money they make per patient -- this is one of the biggest reasons the US spends so much on health care. And there's no effort going in to doing these studies you describe. Sure, someone somewhere may be doing something, but there's not a critical mass of dollars behind it like there are in pharmaceuticals, medical devices, etc. Health care privacy laws also make it nearly impossible to do these kinds of studies. I used to work for a startup that tried this -- they eventually found a market in Canada and Europe but they ended up going under along with all of their competitors because nobody is willing to pay for these types of studies unless you can prove either a cost reduction or improved quality of care at the same cost.