The P.K.E. Scanner Headset is a piece of research equipment used by the Ghostbusturtles.
After Michelangelo convinced the Ghostbusturtles he wasn't possessed and Peter Venkman wasn't a demon, they decided to run tests to completely be sure. Dr. Welker produced the P.K.E. Scanner Headset, put it on, and remarked they were going to scan them both "up the wazoo." After all was said and done, they were cleared and Welker apologized to them for the mishap.
- Teenage Mutant Ninja Turtles/Ghostbusters Volume 2