Descriptor | Hemoglobin moiety | Approximate age | T1 | T2 |
Hyperacute | Oxy | <3 hours | iso or ↓ | ↑ |
Acute | Deoxy | <3 days | iso or ↓ | ↓ |
Early subacute | Intracellular – met | 3 to 13 days | ↑ | ↓ |
Late subacute | Extracellular – met | <3 weeks | ↑ | ↑ |
Chronic | Hemosiderin/ferritin | >3 weeks | iso or ↓ | ↓ |
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