FIG 1. A, Sagittal T1-weighted image showing thrombus in the superior sagittal sinus.

B, Axial T2-weighted fast spin-echo image showing small cortical infarct in the posterior frontal lobe.

C, Diffusion-weighted anisotropic image, slice (z) direction showing increased signal in the right hemisphere. The denser frontal lesion corresponds to the signal abnormality seen on conventional imaging.

D, Mean transit time map from perfusion-weighted imaging showing a large area of prolonged mean transit time in the right hemisphere.

E, Contrast venography of the sagittal sinus showing venous thrombosis with absent flow.

F, Post-treatment venography showing restoration of flow in the sagittal and transverse sinuses. (cont'd )