It consists of superficial and deep cerebral veins
and dural sinuses.
Deep Cerebral Veins and Straight Sinus have Low Signal Intensity on SWI (Susceptibility Weighted Image)
Unilateral thrombosis of deep cerebral vein associated with transient unilateral thalamic edema.
CT was read as multiple punctate curvilinear foci of hypoattenuation regional to the vein of Galen and deep cerebral veins
medial to the left thalamus and left occipital sulcus.
The most frequently observed incident is superior sagittal sinus thrombosis, and it is followed by transverse sinus, deep cerebral veins
and cavernous sinuses (10).
Recent studies found that there is also vasospasm in deep cerebral veins
after subarachnoid hemorrhage , and the diameter significantly decreased 1 day and peaked at 5-7 days after subarachnoid hemorrhage .
CT scanning shows hyperdensity in the venous sinuses, cortical veins, or deep cerebral veins
. When venous infarction develops, areas of low attenuation are seen.
(9) Thrombosis of deep cerebral veins, the vein of Galen, or sinus system has been reported in some subjects with AVG, occasionally, thrombosis is associated with venous infarction.
(2) Anatomically the vein of Galen is the deep cerebral vein formed posterior to the pineal gland by joining of the two internal cerebral veins.
But in one third of people they arise equally from a common trunk which is called "percheron artery" and the thromboemboli of this artery causes bilateral thalamic infarct.9,10 Furthermore thrombosis of deep cerebral veins
could also be the reason of bilateral thalamic infarct.9