MRI (Magnetic Resonance Imaging) Machines


MRI machines produce very strong magnetic fields.

Wikipedia has a chart showing the strength of a variety of magnetic fields. The electromagnet in an MRI machine is at least 100 times stronger than a fridge magnet.

National MagLab – See-Thru Science: How MRI Machines Work (4:43)

What’s the Difference Between an MRI and a CT? (2:31)

My First MRI (2:58)

Because the magnetic field in an MRI is so strong, it is very dangerous to have ferromagnetic materials in the MRI room.

Zaheer Abbas – Dangers of MRI (2:02)

How Dangerous Are Magnetic Items Near an MRI Magnet (2:48)