Frequency of thrombus sign CECT thrombosis of cavenous sinuses with sphnoidal sinusitis and right ICA narrowingTroland vein and SSS thrombosis FLAIR:Vein of Labbe and TS thrombosis and venous infarction empty delta signL transverse,signoid and IJV thrombosis3 daysM/27Y headache 5 daysM/27Y headache 5 days10 days10 days4 years2 weeks解剖变异巨大蛛网膜粒压迹ICV and SS thrombusPC MRANECT11 days after thrombolysis12 days MRI+MRV CT平扫平扫CTVCT增强增强CT MRI+MRV
