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Alberta Stroke Program Early CT Score (ASPECTS)

NeurologyStrokeNeuroradiologyBeta toolThis tool is in beta. It has undergone internal validation but still requires additional testing. Always confirm the data entered and the results obtained before clinical use. It should not be used as the sole basis for clinical decisions.
Deep structures
Early ischemic change in caudateEnter an explicit answer for all ten regions before calculation.
Early ischemic change in lentiform nucleusEnter an explicit answer for all ten regions before calculation.
Early ischemic change in internal capsuleEnter an explicit answer for all ten regions before calculation.
Early ischemic change in insular cortexEnter an explicit answer for all ten regions before calculation.
Ganglionic-level cortex (M1-M3)
Early ischemic change in M1 regionEnter an explicit answer for all ten regions before calculation.
Early ischemic change in M2 regionEnter an explicit answer for all ten regions before calculation.
Early ischemic change in M3 regionEnter an explicit answer for all ten regions before calculation.
Supraganglionic cortex (M4-M6)
Early ischemic change in M4 regionEnter an explicit answer for all ten regions before calculation.
Early ischemic change in M5 regionEnter an explicit answer for all ten regions before calculation.
Early ischemic change in M6 regionEnter an explicit answer for all ten regions before calculation.

Clinical noticeEducational imaging support only. Interpret ASPECTS with full stroke evaluation, vessel imaging, symptom timing, and specialist judgment.

Context and use

ASPECTS = 10 - (caudate + lentiform nucleus + internal capsule + insula + M1 + M2 + M3 + M4 + M5 + M6)

Each involved region subtracts 1 point; all normal = 10, all ten involved = 0.

This calculator returns the raw score for the defined clinical method.

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