Plain CT scans reveal a low-density lesion with interspersed high density in the
right parietal lobe. Note the high density in the posterior sagittal sinus and in dilated
Lower CT sections show high density in the deep cerebral veins, vein of Galen,
and straight sinus.
T2 , FLAIR & T1W images obtained 3 days later reveal mixed signal in a right
temporal parietal mass.
Sagittal T1W image shows abnormal hyperintensity in the deep venous system. Gradient
echo images disclose abnormal hypointensity in the deep veins, straight sinus, and right
transverse sinus. The temporoparietal mass is more hypointense than on the other sequences
Three additional T1W images show the mixed signal lesion in the right hemisphere and
abnormal high signal in the vein of Galen, straight sinus, and right transverse sinus.
The sagittal MR venogram reveals essentially no flow in the deep venous system;
the subtle high signal is due to T1 shortening from the thrombus.
Key words: mri gre mrv vascular stroke
Deep venous thrombosis
with hemorrhagic infarction