SMART-EST(Specialized Multi-center Attributed Registry of sTroke - EndovaScular or Thrombolytic Therapy)

"The investigators will analyzed the CT image that was performed in patients with hyperacute stroke. The CT protocol includes CT thrombus, collateral, core images. The investigators also obtain detailed history and laboratory and imaging result for comorbidity. The comorbidity index protocol is based on the Charlson comorbidity index.~* Cut-off values in thrombus volume and Hounsfield unit according to non-contrast CT images~* Cut-off values in areas of irreversible changes according to non-contrast CT images~* Cut-off values in occlusion sites and collateral scores according to CT angiographies~* Cut-off values of consolidated CT imaging index including clot, core, and collateral score~* Cut-off values of comorbidity index~* Medical care expenses according to comorbidity index in patients who received intravenous thrombolytic treatment and/or endovascular recanalization treatments."