Where do they inject the dye for a ct scan on the head?

For a CT scan of the head, the dye, or contrast material, is typically injected into a vein in the arm. This intravenous injection allows the contrast to circulate through the bloodstream and enhance the visibility of blood vessels and tissues in the brain. In some cases, depending on the specific examination, oral contrast may also be used, but for head scans, the intravenous method is most common.