ASPECTS Background

The Alberta Stroke Program Early CT (ASPECT) Score was developed as a reproducible grading system to assess early ischemic changes on pretreatment CT scans.

Within 3 hours of MCA stroke onset, ASPECT Score correlates with the severity of NIHSS and functional outcome.

  • ASPECT Score of 0: Diffuse involvement throughout the MCA territory
  • ASPECT Score of ≤ 7: Poor functional outcome and symptomatic intracerebral hemorrhage
  • ASPECT Score 8-10: Greater benefit from IV thrombolysis
  • ASPECT Score of 10: Normal

Pexman JH, Barber PA, Hill MD, Sevick RJ, Demchuk AM, Hudon ME, Hu WY, Buchan AM. Use of the Alberta Stroke Program Early CT Score (ASPECTS) for assessing CT scans in patients with acute stroke. AJNR Am J Neuroradiol. 2001 Sep;22(8):1534-42.