Diagnostic neuroradiology for the interventional neuroradiologist

Figure 4 Dual energy computed tomography. A, D: Patient having undergone angiography and embolization for a temporal left AVM; B, E: On the immediate expert computed tomography (CT) performed on the angio table, there was a large area of hyperdensity with probably contrast and blood but which were not distinguishable from one another: the Dual source CT shows that this is mainly due to contrast since there is sonly a small area of blood surrounding the embolized material; C, F: Again a normal C CT afterwards shows the more extensive hyperdensity in the subarachnoid regions due to contrast and blood.