"The periosteal layer and thecal layer of the dura are supplied by vessels that do not have a blood-brain barrier and, as such, enhance readily following administration of intravascular contrast agents. However, they are usually very thin and difficult to identify on routine imaging when up against the inner surface of the bone 7. Dural reflections, such as the falx, are visible but some of this enhancement is vascular rather than meningeal."
Expected headings
"Causes"
"Normal enhancement"
"Excessive enhancement"