[mparlane]

Because CT scans and MRI scans are very different technologies....

CT = xray

MRI = Magnetic resonance imaging

There is no exposure in an MRI to radiation. The only danger would be having bits of metal on you or inside you.

[ohithereyou]

Specifically ferromagnetic metal. Surgical implants are largely okay, but there are some neurostimulators that can be a problem.