Treatment related acute imaging target evaluation using CT

Abstract

To prepare acute revascularization therapy including mechanical thrombectomy and acute stroke imaging are essential to select proper candidate. The components of treatment related acute imaging target (TRAIT) are (1) large vessel occlusion, (2) small core, (3) mismatch (penumbral marker), and (4) collaterals. Even with non-contrast computed tomography (CT) only, occlusion of internal carotid or proximal middle cerebral artery can be diagnosed by hyperdense artery signs. Ischemic core size is commonly evaluated using Alberta Stroke Program Early CT Score (ASPECTS). These signs trigger rapid commencement of thrombectomy. More detailed TRAIT evaluation requires CT-angiography and/or CT-perfusion studies.