Don't do this. Don't suggest its safe for others to do. It's VERY not safe to bring anything ferrous or magnetic into the presence of an MRI. You may destroy the device that is going to help save someone's life.
https://forum.dangerousthings.com/uploads/default/original/1...
as for the Titan Magnets I was just referencing this post
https://forum.dangerousthings.com/t/fingertip-titan-in-an-mr...