Free fMRI brain scan*

*There are a couple catches, however.

"Cephos is offering scans without charge to people who claim they were falsely accused if they meet certain criteria in an effort to get scans accepted by the courts," wrote Gary Stix in an article appearing in the August, 2008 Scientific American.

He continued, "Allowing scans as legal evidence could open a potentially huge and lucrative market. 'We may have to take many shots on goal before we actually see a courtroom,' says Cephos chief executive Steven Laken," in a metaphor that may be mixed but still passes muster with me.

According to the article Cephos claims to predict with 90% or greater certitude whether you are telling the truth.

On the other hand, wrote Stix, "A major review article last year in the American Journal of Law and Medicine by Henry T. Greely of Stanford University and Judy Iles, now of the University of British Columbia, ... found that lie detection studies conducted so far (still less than 20 in all) failed to prove that fMRI is 'effective as a lie detector in the real world at any [their italics] accuracy level.'"