CT Circle of Willis (Axial) - Video Lesson

Hey, everybody, welcome back. This lesson is about the circle of Willis as seen in CT imaging in the axial plane. This is a CT angiography study in the axial plane. Notice that this image is reconstructed in the standard algorithm as usual, But the windowing technique is different. We're not looking at the brain matter this time. The study is designed to demonstrate the opacified blood vessels, which are best demonstrated with a four hundred window width and forty window level. We'll start at the base of the cranium and follow the vessels through the cerebrum. We can see the right and left vertebral arteries. These are the arteries that ascend through the transverse foramina of the cervical spine and enter the cranium here at the level of the foramen magnum. These vertebral arteries will eventually converge to form the basilar artery and supply the circle of Willis. The circle of Willis is also supplied by the right and left internal carotid arteries. Moving superiorly in the axial plane, we can see the right