Table 7. Classification of myocardial and hepatic iron overload (MIO/HIO) by magnetic resonance imaging.

T2* (ms) 1.5 T	R2* (Hz) 1.5 T	T2* (ms) 3.0 T	R2* (Hz) 3.0 T	MIO/HIO (mg/g DW)	Classification
Heart
> 20	≤ 50	> 12.6	≤ 79	≤ 1.16	Normal
10 to 20	50 to 100	5.8 to 12.6	79 to 172	1.16 to 2.71	Slight/moderate overload
< 10	> 100	< 5.8	> 172	> 2.71	Severe overload
Liver
> 15.4	≤ 65	> 8.4	≤ 119	≤ 2.0	Normal
4.5 to 15.4	66 to 224	2.3 to 8.4	120 to 435	2.0 to 7.0	Mild
2.1 to 4.5	225 to 475	1.05 to 2.3	436 to 952	7.0 to 15	Moderate
< 2.1	> 475	< 1.05	> 952	> 15	Severe

DW: dry weight.