Be careful with anything containing ferrous metal near an MRI machine! As an orthopedic surgeon, I order MRIs often. I've heard stories and seen pictures of oxygen tanks, stretchers, chairs, and many other objects containing iron that were sucked into the machine. While there is an emergency off switch for an MRI machine, it can cost $50,000 or more to turn an MRI machine off and back on due to the amount of energy that is required and helium that is utilized. Some metals such as aluminum, coppe