MRI scanning of the brain generally cannot directly check the blood supply of the posterior circulation of the brain, but MRI cerebral angiography can.
The clinical significance of cerebral MRI is to clarify whether there are occupations in the brain, cerebral infarction, cerebral hemorrhage, cerebral hematoma, arteriovenous malformation, and whether there are hemangiomas. Cerebral MRI scanning cannot directly reflect the insufficient blood supply of cerebral arteries, but it can indirectly reflect, such as the observation of cavernous cerebral infarction, cerebral atrophy, demyelination of the brain, and other changes, which can indirectly suggest insufficient cerebral blood supply.
Cerebral blood supply is mainly judged clinically by cerebral ultrasound, cerebral angiography and cervical Doppler ultrasound. If you want to get specific information about cerebral blood flow, magnetic resonance perfusion imaging can be used to quantitatively measure the blood flow per minute per hundred grams of brain tissue, accurate to the amount of arterial blood flowing through the brain tissue per minute, so as to quantitatively diagnose the severity of cerebral blood supply insufficiency.
Patients who want to undergo a cerebral blood supply test are advised to go to a regular hospital to complete the relevant examination.