Brain MRI

Background

T1- bright-methemoglobin/ fat/ protein- like ct

T2- fluid bright

FLAIR- fluid attenuation inversion recovery - like t2 without

csf ( ms)

Diffusion- restriction free water motion

Blood

blood T1 T2

hyperacute dark, iso bright (oxyhemo)

acute bright dark (deoxyhemo)

1-3 days bright dark (methgb/intracellular)

1-2 wks bright bright ( extracelluar)

2-3 wks dark dark