Headache [R51], Reason for Study: ^Reason: CT head w/ e/o extra-axial hyperattenuation along the right frontal parietal convexity. Please assess if lesion is hematoma vs venous thrombus. Please obtain thin section post-contrast images. Brain MRIThere is a thin (about 4 mm) layer of extra-axial T2 low signal intensity and T1 iso and/or slightly high signal intensity lesion along the right frontal parietal convexity with susceptibility artifacts indicating acute/subacute hemorrhage.The lesion does not appear to be crossing the subarachnoid space, therefore, the possibility of thrombosed cortical vein is unlikely.There is no evidence of acute ischemic lesion on the scan.The ventricles, sulci and cisterns are symmetric and unremarkable. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.Brain MRV3D MRV brain post-gadolinium with maximum intensity projections of the superficial/deep intracranial venous drainage demonstrate normal flow enhancement in the superior sagittal sinus, transverse sinuses, sigmoid sinuses, internal cerebral veins, vein of Galen and straight sinus.
1. Thin (about 4mm) extra axial blood products on the right fronto-parietal convexity. Differential diagnosis include extra axial blood products. Cortical vein thrombosis is unlikely.2. No evidence of acute ischemic lesion. 