What is cerebrovascular imaging?

Cerebral angiography is an imaging examination that can show the blood vessels in the brain.

Cerebral angiography can not only show the morphological changes of blood vessels, such as dilation, deformity, spasm, stenosis, vascular occlusion, bleeding and so on. You can also judge whether there is space occupation according to the change of blood vessel position.

Therefore, it is of special significance for the diagnosis of intracranial vascular diseases, which can be said to be the gold standard for the diagnosis of cerebrovascular diseases. In recent years, with the wide application of computed tomography and magnetic resonance imaging and the development of vascular imaging technology, computed tomography or magnetic resonance imaging has been applied to some intracranial space-occupying lesions and peripheral vascular lesions.

But these tests can't replace cerebral angiography in many ways. For example, patients with subarachnoid hemorrhage are usually caused by intracranial aneurysms or vascular malformations. For small diameter aneurysms, spiral CT and magnetic resonance angiography may not be able to show them. Once missed diagnosis, the consequences are very serious.

Extended data:

Cerebrovascular imaging includes four categories:?

1, color Doppler ultrasound. As a general survey or reexamination after treatment of cerebrovascular diseases, it is often used in internal medicine, and the results are for reference only. ?

2.MRA and MRV: The examination of arteries and veins does not require injection of contrast media and magnetic vibration. Internal medicine is often used as a screening method for cerebrovascular diseases. Commonly used, low price, but low accuracy.

3.CTA: CT angiography shows arteries after intravenous injection of contrast agent. Three-dimensional imaging can be performed and the bone window can be exposed. The development is more accurate, but it lacks vascular dynamics and cannot show the dominant blood supply. ?

4.DSA: the gold standard of cerebrovascular diagnosis, which can display arteriovenous and hemodynamics and can be imaged in three dimensions. Disadvantages are invasive and expensive.

Baidu encyclopedia-magnetic vibration angiography