RAPID ASPECTS (based on the Alberta Stroke Program Early CT Scoring system) provides an automatically generated measure of early ischemic change on Non-Contrast CT (NCCT) scans, which predicts irreversible tissue injury.
Its scores have been used to triage patients with large artery occlusions into some endovascular therapy studies and are part of the American Heart Association guidelines for use of endovascular therapy in patients who can be treated within 6 hours of symptom onset. Specifically, thrombectomy is not recommended for patients with ASPECTS ≤ 5. One of the limitations of ASPECTS is that only fair to moderate inter-rater agreement between stroke imaging experts has been achieved in most studies.
RAPID ASPECTS automates and standardizes this process to assist clinicians who are assessing early signs of brain ischemia.