Excellent pictures of body tissues and blood vessels can be obtained. Spinal fluid a special fluid produced by structures near the brain that bathes the brain and spinal cord. Stroke injury to a part of the brain due to interrupted blood flow from either blockage or rupture of an artery in the brain Subarachnoid space a space between the inside of the skull and brain surface that is filled with cerebral spinal fluid. Synthetic graft tube or hose shaped artificial material that replaces the portion of an artery that was removed. Veins blood vessels returning blood from the body to the heart.
Veins are much thinner than arteries and under much lower blood pressure.