Imaging of Central Nervous System Ischemia

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Mechanical thrombectomy has transformed acute stroke care since 2015.
• Imaging-based selection expanded thrombectomy eligibility and increased perfusion imaging use.
• Debate continues on the necessity and timing of advanced imaging in stroke care.

Purpose of the Study:

• To describe imaging modalities for acute ischemic stroke evaluation.
• To highlight the importance of understanding neuroimaging for practicing neurologists.
• To inform therapeutic decision-making in time-sensitive stroke care.

Main Methods:

• Review of current neuroimaging techniques for acute ischemic stroke.
• Discussion of CT-based imaging (noncontrast CT, CT angiography).
• Exploration of advanced imaging including CT perfusion and MRI/MR perfusion.

Main Results:

• Noncontrast head CT is the initial step for stroke evaluation.
• CT angiography effectively detects large-vessel occlusions.
• Advanced imaging provides crucial data for specific clinical scenarios.

Conclusions:

• Rapid neuroimaging and interpretation are essential for timely reperfusion therapy.
• A thorough understanding of imaging modalities aids in optimizing acute stroke treatment.
• CT and MRI techniques play vital roles in selecting patients for advanced stroke interventions.