This 67-year-old female patient was evaluated on the Brilliance 40-channel scanner for recent head trauma. The CT scan of the brain revealed an incidentally discovered basilar artery tip aneurysm. CTA of the neck and Circle of Willis were performed for treatment planning purposes.
The CTA examination of the aortic arch shows normal great vessel branching. There is moderate bilateral carotid bifurcation atherosclerotic calcification, but no significant flow-limiting stenosis. The right vertebral artery is dominant. There is approximately 50% stenosis at the origin of the left vertebral artery.
Examination of the intracranial circulation shows a 10 mm basilar artery tip aneurysm with a relatively narrow neck. The aneurysm points superiorly and demonstrates some mild lobulation near its dome. No additional aneurysm is identified.
Though cerebral aneurysms can cause headaches, blurred vision, or neck pain, they often present no symptoms and therefore go unnoticed. The fortunate incidental discovery of this basilar artery aneurysm allowed intervention to be performed before serious complications could arise. This exam provided a totally non-invasive treatement plan for coil embolization including assessement of the access vessels, and the aneurysm volume and dimensions. A successful complete coil embolization of the basilar artery aneurysm was achieved.
Philips Brilliance CT 40-channel system provides the speed for pure aterial phase imaging with a reduced amount of IV contrast. In addition, our isotropic CTA scan data provides excellent spatial resolution to confidently differentiate minute vascular structures using our Brilliance Workspace applications tools such as volume rendering, Slab Volume Intensity Projection (VIP) and MIP. These benefits allow the physician to easily evaluate the results and define a treatment plan.