A test which finds all kinds of things, disease or not will have a very high number if you are looking at false negatives.... the problem is specificity. When you are looking for a particular "trait" of a disease and not the disease itself as in PET scans, the problem is not false negatives, it is a high degree of false positives. Gary has this right and it has been stated here before. Scanning technologies are only part of the puzzle when it comes to knowing what is going on for sure.

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.