Everyone attaches importance to health, but some diseases still appear. Smoke and fog disease is a relatively dangerous cerebrovascular disease, although it is not common clinically, but once the onset of the disease on the health of patients is very big impact. Smoke disease can induce epilepsy, cerebral hemorrhage, cerebral infarction, etc., and may even directly threaten life safety. Therefore, when you notice similar symptoms of the condition, you must go to the hospital in time to check and confirm the diagnosis, and actively and effectively treat the condition. So how do you check? Is MRI for smog okay? There are many ways to detect smog in medicine. Magnetic resonance imaging is able to detect smog and diagnose the associated lesions. Magnetic resonance imaging, also known as MRI, is useful in the diagnosis of smog, but the results are sometimes not very accurate. Therefore, in addition to MRI, there are other effective tests that can be used to diagnose smog. For example, MRI, also known as MRA, is an MRI test that is specific to blood vessels and can diagnose smog better than MRI. In addition, there is also CT angiography, or CTA, which is usually called a CT scan, in which a contrast agent is injected into the patient’s blood vessels to reveal their structure. CTA can clearly show the anterior middle and posterior cerebral arteries and other branching vessels, which provides a key diagnostic basis for the detection of smog. In fact, the gold standard for diagnosing smog is cerebral angiography, or DSA, which not only clearly shows the internal carotid artery, the basilar artery, the large intracranial vessels and the blood vessels of the cerebral hemispheres, but also measures the blood flow of the arteries, which not only provides the exact location of the lesion, but also gives a clear understanding of the extent and severity of the lesion, providing a more reliable and objective basis for surgery. As for the question of whether MRI is okay for smog, some patients ask. If the purpose of the examination is only to clarify the diagnosis, then MRI or magnetic resonance angiography is possible. However, if surgery is to be performed, cerebral angiography should be performed, together with other routine preoperative examinations such as cerebral perfusion examination, to comprehensively assess the blood supply to the brain and the degree of vascular lesions, to design a scientific and thorough surgical plan, and to better carry out surgical treatment.