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Temporal evolution of intracerebral hematoma on MRI

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 ↓	↓

MRI: magnetic resonance imaging; T1: T1-weighted sequence; T2: T2-weighted sequence; oxy: oxyhemoglobin; iso: isointense or same signal intensity as brain; ↓: hypointense compared with normal brain; ↑: hyperintense compared with normal brain; deoxy: deoxyhemoglobin; met: methemoglobin.

Courtesy of Glenn A Tung, MD, FACR.

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