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Cerebrovascular CT-angiography

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Cerebrovascular CT-angiography

Cerebrovascular CT-angiography as a comprehensive study of brain vessels (arteries, veins) makes it possible to identify and study the important angiographic signs of various diseases of the brain. CT angiography of cerebral arteries leads as well to clarify the morphological and functional changes in the cerebral vessels.

The diagnostic procedure of cerebrovascular CT-angiography.

All detected by cerebrovascular CT-angiography signs of organic disease of the brain, for practical reasons, grouped into five major groups:

  1. Changes in the position of cerebral vessels
  2. Changes in the number of of cerebral vessels
  3. Changes in the shape and width of the vascular lumen
  4. Changes in the circulation of the contrast agent on the vascular bed in the brain
  5. Leakage of contrast agent outside the walls of cerebral vessels
Conceptual illustration and cerebrovascular CT-angiography of common internal and external carotid arteries. In the patient identified strongly expressed stenosis (narrowing) of the internal carotid artery, which may be associated with brain embolism or cerebral tissue ischemia.

In various diseases of the brain cerebrovascular CT-angiography in the first place serves some one angiographic symptom, such as a partial displacement of the vessel close to the lesion, but often at the same time is determined by the number of angiographic signs, combined with each other in various combinations.

On the cerebrovascular CT-angiography are shown anterior and the middle cerebral artery in the middle and the posterior cranial fossa (side view).
On the cerebrovascular CT-angiography are shown anterior and the middle cerebral artery in the middle and the posterior cranial fossa (side view).

Each of the groups of angiographic signs of cerebrovascular brain diseases given above has not the same diagnostic value.

Some morphological and functional changes detected on CT angiography, observed only in pathological processes, such as tumors, aneurysms, thrombosis. Therefore CT angiography to identify such features directly indicates the anatomic nature of the process and its localization in the brain.

On the cerebrovascular CT-angiography with contrast are shown arterial and venous phases of the cerebral blood supply.

 

Indications for the cerebrovascular CT-angiography

Cerebrovascular CT-angiography is inducated for patients with:

On the cerebrovascular CT-angiography are shown vertebral and the basilar artery in the posterior cranial fossa (rear view).

On the computer (CT) angiography of the neck vessels are shown vertebral and carotid arteries (front view).