Hepatic and myocardial iron quantification can be performed noninvasively with MRI. MRI can quantify a parameter called "T2*", which is an indicator of the amount of iron in the liver and myocardium. The smaller the T2*, the greater then iron deposition. For exams performed on 1.5 Tesla magnets, T2* < 5 milliseconds indicates severe iron overload, 5 < T2* < 10 milliseconds indicates moderate iron overload, 10 < T2* < 20 milliseconds reflects mild overload, and T2* > 20 milliseconds is normal.
