IR — FLAIR · 1.5T

TR = 9000 ms · TI = 2400 ms (CSF null) · TE = 120 ms · 2 cycles — CSF T1≈3600ms nulled; WM lesions appear bright against suppressed CSF background

Fat (T1=260ms)

White matter (T1=650ms)

Grey matter (T1=950ms)

Muscle (T1=860ms)

CSF (T1=3600ms) — nulled at TI