ASPECTS Score Calculator — Alberta Stroke Program Early CT Score
Cortical regions (M1–M6)
Subcortical regions
Trials informing thresholds
Trials that defined or extended the ASPECTS threshold for EVT eligibility.
- MR CLEAN2015
Landmark first modern positive thrombectomy trial for anterior circulation LVO.
- ESCAPE2015
Rapid EVT trial using collateral-based CT selection and strict workflow targets.
- EXTEND-IA2015
Perfusion-selected thrombectomy trial showing major reperfusion and functional gains.
- SWIFT PRIME2015
Solitaire thrombectomy trial showing large functional gains over IV tPA alone.
- REVASCAT2015
Registry-embedded Spanish thrombectomy trial confirming benefit within 8 hours.
- DAWN2018
Clinical-imaging mismatch trial that redefined thrombectomy eligibility out to 24 hours.
- DEFUSE-32018
Late-window thrombectomy trial using perfusion imaging to identify salvageable tissue up to 16 hours.
- SELECT-22023
Large-core stroke trial showing thrombectomy still benefits selected patients with substantial infarct burden.
- ANGEL-ASPECT2023
Large-core thrombectomy trial supporting EVT in patients previously considered poor candidates.
- TENSION2023
Large-core EVT trial using pragmatic non-contrast CT selection rather than perfusion imaging.
- LASTE2024
Large-core thrombectomy trial showing better outcomes and lower mortality despite more bleeding.