hypointense areas on the T1W images which turn hyperintense on
the Proton & T2W images are noted in the left parietal lobe. An
area which is predominantly hypointense with a hyperintense rim
on all sequences is noted in this lesion (subacute blood). The
lumen of the superior sagittal sinus shows a hyperintense signal
(no flow on the MRV-images not available) representative of a
thrombus in this case.
Diffuse distribution, not conforming to vascular territories (as
seen with arterial infarcts).
Hemorrhage may be present (20%).
May find a lack of the normal flow void within a dural venous
sinus (e.g. in the superior sagittal sinus).
Gyral/Wedge shaped enhancement (32%).
May see intense tentorial enhancement (collateral's/venous
May see dilated transcerebral medullary veins (connecting the
superficial cortical veins with the subependymal veins).
In the late stage, there will be encephalomalacic changes.