PERFUSION COMPUTER TOMOGRAPHY IN THE DIAGNOSIS OF ACUTE CEREBRAL CIRCULATION ACCIDENT

Abstract Relevance: Perfusion computed tomography (PCT) is one of the main methods of CT examination, which has spread with the development of fast multispiral tomography technology, and has become the standard for emergency diagnostics of ischemic stroke and detection of reversible brain tissue damage. PCT allows to evaluate the physiology of the brain parenchyma, namely tissue (capillary) blood flow. The degree of perfusion of the brain substance depends on the speed and volume of blood flow through large-capacity vessels (internal carotid arteries and their intracranial branches) and through the capillary bed. PCT usually uses the first pass of contrasted blood. With computer processing using deconvolution algorithms, perfusion parameters are calculated that allow estimating cerebral blood flow. Objective: The development of perfusion CT of the brain was the diagnosis of ischemic changes in the brain substance at the early stages of the onset of symptoms of stroke to determine adequate further treatment tactics. Research methods: This article explains the principles of the technique, its applicability in modern multidisciplinary clinics as an emergency and planned method for studying cerebral blood flow.