> Of course, there is no risk with a full-body MRI scan. Not quite true. While the scan itself isn't harmful, the strong magnetic fields, RF fields and noise h

> Of course, there is no risk with a full-body MRI scan. Not quite true. While the scan itself isn't harmful, the strong magnetic fields, RF fields and noise have caused several accidents, some fatal. Compare for example http://www.auntminnie.com/index.aspx?sec=sup_n&sub=mri&pag=dis&ItemID=96699 http://www.auntminnie.com/index.aspx?sec=sup_n&sub=mri&pag=d... "The FDA's Manufacturer and User Facility Device Experience (MAUDE) database documented a total of 40 incidents for MRI in 2004. In 2009, the total more than quadrupled, to 193 reported adverse events." Example of a fatality: http://abcnews.go.com/US/story?id=92745 http://abcnews.go.com/US/story?id=92745 > False positives aren't inherently a problem. If you have accurate understanding of the sensitivity and specificity of a test, then you can take action to maximise the utility of the expected outcome. False positives can still cause huge psychological strain on the involved person(s).