Spontaneous discharge of a firearm in an MR imaging environment.

An incident recently occurred at an outpatient imaging center in western New York State, in which a firearm spontaneously discharged in a 1.5-T MR imaging environment with active shielding. To our knowledge, this is the first documented case of such an occurrence. The event confirms previously reported theoretic risks of a firearm discharging in an MR imaging environment [1]. In this report, we examine the incident in detail from the official police and ballistic reports.