CT is preferred for acute stroke patients to rule out cerebral hemorrhage, and should be supplemented with MRI for ischemic stroke patients to clarify their condition and guide the establishment of treatment plans. Stroke is divided into ischemic stroke (cerebral infarction) and hemorrhagic stroke (cerebral hemorrhage), the pathogenesis, survival time, and treatment options are different, because of the faster examination time of brain CT, the acute onset of brain CT is feasible to identify and diagnose. However, CT has a poorer ability to visualize brain tissue, so it is often necessary to combine with magnetic resonance imaging (MRI) of the brain to clarify the condition. MRI is a kind of imaging equipment for medical examination made by using the nuclear magnetic resonance phenomenon. Brain MRI can provide more information than brain CT, with clearer imaging, high soft tissue resolution, better detection of ischemic foci, assessment of the condition of ischemic stroke patients, and an important role in guiding the doctor’s treatment plan and prognosis. When a stroke is suspected, it needs to be evaluated by a medical professional for appropriate examination. MRI can help doctors find the lesion, clarify the size and type of the lesion, and guide the establishment of a treatment plan.