[Panzer04]

The root of the issue seems to be that general scans are simply not that informative unless problems are very obvious or couched with other symptoms. If they can't tell the difference between a benign lump and a tumor without additional information then they don't actually serve a useful purpose. Garbage data is useless, after all.

Using them in a targeted manner because the patient is reporting symptoms or somesuch appears to be a different use case. The signal to noise ratio of an untargeted scan is otherwise too high to be of much value determining treatment.