The Mobile X-Ray Machine is equipment used by Egon Spengler in his laboratory.
Egon ran a gambit of tests on the new television assimilated by the Water Elemental. He had Slimer wheel the Mobile X-Ray Machine in front of the television set. The Ghostbusters observed Slimer's X-Ray and Peter Venkman recognized his set of keys inside him.
- On page 17 of Teenage Mutant Ninja Turtles/Ghostbusters Volume 2 Issue #1, in panel 2, the Mobile X-Ray Machine makes a non-canon cameo by Egon.