Is there a shot or an i.v. involved when doing a lumbar ct scan with dye?

CT with contrast: Before the study, an IV will be started, through which the contrast ("dye") is injected. Usually a lumbar scan is done first without contrast and then a second time with contrast to enhance structures like discs, spinal cord, nerves. They may request a blood test of your kidney function to make certain your kidneys can deal with the contrast.

Yes: Myleogram involves putting dye in the sac that contains nerves with a needle contrast dye can also be injected in veins to identify vesselstwo places to put dye both involve needles.