SQUID is a completely different machine from MRI. Only 4 SQUID machines exist in the world...2 in the US, 1 each in Germany and Italy. Because of the unavailability of this test to so many people, I would suggest T2* as an alternative to SQUID.
For more on SQUID, see
http://www.thalassemia.com/chelation_2.htmlA third, very accurate method of measuring iron is through a radiologic study performed by a machine called SQUID, the Superconducting Quantum Interference Device. The SQUID or Ferritometer devices use magnetic fields to measure the amount of iron stored in the liver. The procedure is non-invasive and takes less than 15 minutes to complete. Non-invasive liver iron measurements are currently available at two locations in the United States: Columbia-New York Presbyterian in New York (SQUID) and Children's Hospital & Research Center in Oakland,
California (Ferritometer).