GJLP / SCIENCE PHOTO LIBRARY GJLP / SCIENCE PHOTO LIBRARY
Carotid aneurysm surgery. Surgeon repairing an aneurysm in a patient's carotid artery. A 3D scan of the artery is seen on the screen at upper right. The internal carotid artery carries blood to the head. The aneurysm, a blood- filled dilation in a blood vessel, is just before the internal carotid artery branches into the middle cerebral artery. Aneurysms are caused by a weakening of the vessel wall, which may be caused by hardening of the artery (atherosclerosis), high blood pressure or injury. If left untreated aneurysms rupture and are often fatal.
Model release not available. Property release not required.