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Diagnostic Criteria of Hemorrhage in MRI of the Brain
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Age
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T1 Weighted
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T2 Weighted
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Hyperacute
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Hours old, mainly oxyhemoglobin with surrounding edema
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Hypointense
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Hyperintense
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Acute
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Days old, mainly deoxyhemoglobin with surrounding edema
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Hypointense
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Hypointense, surrounded by hyperintense margin
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Subacute
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Weeks old, mainly methemoglobin
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Hyperintense
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Hypointense, early subacute with predominantly intracellular methemoglobin. Hyperintense, late subacute with predominantly extracellular methemoglobin
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Chronic
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Years old, hemosiderin slit or hemosiderin margin surrounding fluid cavity
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Hypointense
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Hypointense slit, or hypointense margin surrounding hyperintense fluid cavity
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Fundamentals of Operative Techniques in Neurosurgery by G. McKhann, Publisher: Thieme Medical Publishers; 1st edition (January, 2002)
Handbook of Neurosurgery by Greenberg, 5th edition (September 27, 2000)
CT and MR Imaging of the Whole Body (2-Volume Set) by J. Haaga, 4th edition (December 2, 2002)
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