Patient: Dizziness and weakness of the right limb. 2 months ago, I had laboratory tests and a head MRI: I was hospitalized for half a month for infarction in the left plantar area, and now I am recovering okay on one side of the limb. I heard from others that I can have a stent put in for this disease? Do I need to have an angiogram to diagnose cerebral infarction? Is it dangerous to put in a stent? It is necessary to do an imaging so that the blood supply to the cerebral vessels can be clarified and guidance can be provided for the next step of treatment. Patient: Is it dangerous to do imaging? How long does it take? Angiography is an invasive test and carries certain risks. However, the current equipment, drugs and technical conditions are better, and the risk is significantly less than before. The length of time is highly randomized and may take longer if the patient has curved blood vessels. The length of time is not the main thing, but the main thing is to see the vascular condition clearly.