An anonymous reader writes "BBC news is reporting a new handheld scanner that can detect cancers in patients. In clinical trials at a hospital in Milan, the scanner was able to correctly identify 93% of prostate cancer patients whose condition was later confirmed by a biopsy operation."
Damnit Jim, I'm a doctor, not a bricklayer!
I could identify 100% of all cancers if you let me have unlimited false positives.
I could identify 100% of all cancers with zero false positives if you give me a stick of uranium.