The incident occurred when the officer responded to a reported burglary Friday, WMAQ-TV, Chicago, reported. The magnetic force of the MRI machine pulled the officer's gun away from him.
No injuries were reported.
Carol Stream police got in touch with the manufacturer of the machine for advice on how to extricate the gun from the machine.
Officers were also investigating the burglary.
N.J. man wakes up from 10-hour sleep with knife in back
Campus cop fatally shoots Texas student during traffic stop