Category ""
ADVERTISING
In this article, we will discuss two intravenous (IV) contrast computed tomography (CT) imaging techniques: CT angiography (CTA) and CT perfusion. Both CTA and CT perfusion imaging can help clinicians predict the benefit of intervention for acute stroke patients.
CT perfusion in ischemic stroke has become established in most centers with stroke services as an important adjunct, along with CT angiography (CTA), to conventional unenhanced CT brain imaging.
Computed tomography angiography (CTA) and CT perfusion (CTP) of the brain are two imaging procedures which are reported to be of paramount importance in the evaluation of acute stroke apart from unenhanced CT for emergency situation (2 - 7).
CT Perfusion shows the volume of viable brain at risk due to reduced flow. This can help to demonstrate the penumbra. The Infarct core can be identified as that part of the brain which has already infarcted or is destined to infarct regardless of therapy.
Computed tomography (CT), CT angiography (CTA), and CT perfusion (CTP) play crucial roles in the comprehensive evaluation and management of acute ischemic stroke (AIS), aneurysmal subarachnoid hemorrhage (SAH), and vasospasm.
This diagnostic study evaluates the diagnostic accuracy, interrater reliability, and safety of brain computed tomography perfusion and computed tomography angiography for death by neurologic criteria.
Objective: To systematically evaluate the accuracy of noncontrast computed tomography (NCT), perfusion computed tomography (PCT), and computed tomographic angiography (CTA) in determining site of occlusion, infarct core, salvageable brain tissue, and collateral flow in a large series of patients suspected of acute stroke.
Noncontrast head CT is used to evaluate for the presence of a hemorrhage and/or infarcted territory. CT-angiography is used to localize the site of the occlusion and assess collateral circulation, as well as for endovascular intervention planning.
This new methodology provides for extremely rapid access to four important aspects of neurovascular disease assessment: (1) unenhanced whole-brain CT, (2) contrast-enhanced whole-brain CT, (3) real-time 3D dynamic CTA, and (4) whole-brain CT perfusion (CTP).
CTP has been validated against a combination of invasive coronary angiography and single-photon emission computed tomography (CT) (7), stress cardiac magnetic resonance (8), or invasive FFR (9).