Angiography

Lateral view

Lateral view

Towne's view

VERTEBRAL ANGIOGRAPHY

Towne's view

Lateral view

Lateral view

CAROTID ANGIOGRAPHY

The anterior cerebral arteries run over the corpus callosum, supplying the medial aspects of the frontal lobes. Both anterior cerebral arteries may fill from each carotid injection. The middle cerebral artery runs in the depth of the Sylvian fissure. Branches supply the frontal and temporal lobes.

The internal carotid artery bifurcates into the anterior and middle cerebral arteries.

Oblique views may aid identification of some lesions, e.g. aneurysms.

Contrast medium

Posterior cerebral arteries supply the occipital lobes and parts of the parietal and temporal lobes Basilar artery, branches supply the -

brain stem and cerebellum Vertebral arteries: branches supply the spinal cord, brain stem and cerebellum

Compression of the contralateral vertebral artery in the neck during contrast injection produces retrograde flow and demonstrates both vessels with one injection

In carotid and vertebral angiography look for: Vessel occlusion, stenosis or plaque formation Aneurysms

Arterio-venous malformations

Abnormal tumour circulation 1 Although superseded by the CT scan in Vessel displacement or compression. J tumour detection, angiography may give useful information about feeding vessels and the extent of vessel involvement with 44 the tumour.

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