Legend 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 subependymal veins.

Legend Lower CT sections show high density in the deep cerebral veins, vein of Galen, and straight sinus.

Legend T2 , FLAIR & T1W images obtained 3 days later reveal mixed signal in a right temporal parietal mass.

Legend 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

Legend 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

Brain Diagnosis: Deep venous thrombosis with hemorrhagic infarction