Brain ischemia: CT and MRI techniques in acute ischemic stroke

Area of Science:

• Neurology and Radiology
• Neuroimaging in Stroke Management

Background:

• Imaging is essential for selecting patients for acute ischemic stroke treatments.
• Computed tomography (CT) and magnetic resonance (MR) imaging are standard for diagnosis and treatment planning.

Purpose of the Study:

• To review the role of various imaging techniques in arterial ischemic stroke treatment selection.
• To evaluate how imaging aids in identifying patients who benefit from revascularization therapies.
• To discuss the significance of imaging in determining treatment decisions and patient outcomes.

Main Methods:

• Review of current literature on CT/CT angiography and MR/MR angiography in stroke.
• Analysis of multiparametric imaging techniques (CT perfusion, MR diffusion/perfusion-weighted imaging).
• Assessment of imaging's ability to evaluate brain infarct core, penumbra, collateral circulation, and clot characteristics.

Main Results:

• Imaging excludes stroke mimics and hemorrhage, determines stroke cause, and identifies arterial occlusion.
• Multiparametric imaging quantifies infarct core and penumbra, guiding reperfusion therapy.
• Imaging assesses collateral status and clot burden, informing treatment strategies.

Conclusions:

• Advanced imaging enables individualized treatment decisions for stroke patients, potentially extending therapeutic time windows.
• Imaging is critical for identifying patients who will benefit most from revascularization, improving clinical outcomes.
• The accuracy and clinical significance of different imaging techniques for stroke treatment are reviewed.