Preparing for a successful MRI screening involves more than just lying still.Certain materials can interact with the strong magnetic field of an MRI (magnetic resonance imaging) machine, so what you wear — or don’t wear — is essential.

A 61-year-old man died after being pulled into an MRI machine by its magnetic field at Nassau Open MRI in Long Island. Authorities are investigating the incident.

Keith McAllister was caught in an MRI machine at Nassau Open MRI in Westbury, N.Y. on July 16, and died of his injuries the following day. In an emotional interview, his wife recalled him going 'limp' in her arms and watching the machine 'snatch him.