No, this machine isn't a torture device. It's just an old-fashioned X-ray, which was proposed as a method of identifying criminals. D. Thomas A. Poole, of Washington, D.C., said that after analyzing thousands of skulls, he was convinced that no two skull cavities were alike. Instead of relying on fingerprints, why not keep a library of sinus X-rays? Criminals can wear gloves or burn off their fingerprints, but they can't change the shape of their skulls. Simply take an X-ray photo upon detainment and cross-reference it with the database. Of course, the problem here is that people can't leave skull imprints the same way they can leave fingerprints, so we're not surprised that the idea didn't take off.
Read the full story in "X-Ray Photo of Skull May Be Used to Identify Crooks"