The Common Vein Copyright 2010
Definition
Aging the Hemorrhage on MRI
Hyperacute – minutes to hours
T1 – hematoma (deoxyHb) dark => isointense
T2 – hematoma (deoxyHb) dark=> isointense
Acute – 0-2 days
deoxyhemoglobin is in intact RBCs with surrounding edema
T1- hematoma isointense, edema dark
T2 – hematoma dark, edema bright
Subacute – 2-14 days
deoxyhemoglobin changes to methemoglobin from outer to inner
T1 – outer core bright
T2 – outer core bright due to shortened T1, longer T2
Chronic – 14 days
hemosiderin laden macrophages at periphery
T1 – inner core bright, rim dark
T2 – inner core bright, rim has low dark
Chronic – months later
hemosiderin laden macrophages at periphery
T1- mostly iso-/dark, rim is dark
T2- markedly dark rim – “blooms” with greater T2-weighting