Figure 2. These are thin adjacent cuts (A–M) of the same initial computed tomography scan as shown in Figure 1. Note that a curvilinear area of increased signal intensity, just underneath the skull (white arrows), travels from the hematoma to the superior sagittal sinus (black arrow in L) and represents the thrombosed cortical vein. Within the superior sagittal sinus (black arrow in L), there is a gradient of signal intensity: the left portion of the image has a lighter signal indicating the clotted blood within the sinus. This represents the area of signal loss on the magnetic resonance venogram in Figure 3.