Indications：intracranial vascular diseases, such as arteriosclerosis, thrombosis, stenosis, occlusive diseases, arteriosis, arteriovenous malformation, and arteriovenous fistula; intracranial space -occupying lesions, such as intracranial tumors, abscesses, cysts, and hematoma; observation of cerebrovascular circulation after extracerebral hematoma operations arising from craniocerebral traumas DSA not only clearly displays vascular images of the internal carotid artery, vertebrobasilar artery, intracranial large blood vessels, and cerebral hemispheres, but also measures blood flows of arteries, so it is applied widely to the examination of cerebrovascular diseases. In particular, it is the best means of qualitative local diagnosis for aneurysms, arteriovenous malformation, etc., and is of high diagnostic value for ischemic cerebrovascular diseases.

Feature：DSA can determine the range of a tumor, observe the blood supply in the tumor vessels, perform guided radiography before the infusion chemotherapy of tumor arteries, and select the best blood vessel for the infusion chemotherapy.