Inclusion Criteria:  Being over the age of 18 Patients with acute ischemic stroke who applied to Ege University Emergency Service and decided to undergo intravenous thrombolytic and / or endovascular thrombectomy treatment or treatments by a Neurology Specialist.  Exclusion Criteria:  Under 18 years old Trauma Resuscitation applied Patients presenting with acute ischemic stroke clinic but not eligible for intravenous thrombolytic and / or endovascular thrombectomy treatment or treatment. Patients without written consent Patients who cannot undergo NIRS monitoring for any reason Patients with skin lesions,hematoma, mass etc. in the forehead (electrode placement site). Having a level of jaundice on the skin that can be seen by inspection.