Neuroimaging of ischemic stroke with CT and MRI: advancing towards physiology-based diagnosis and therapy

Area of Science:

• Neurology
• Radiology
• Emergency Medicine

Background:

• Acute ischemic stroke is a leading cause of death and disability.
• Effective treatments exist but are underutilized due to narrow time windows.
• The ischemic penumbra concept is crucial for understanding stroke physiology.

Purpose of the Study:

• To explore the role of the ischemic penumbra in acute ischemic stroke management.
• To propose an evidence-based alternative to current stroke therapies.
• To highlight the potential of advanced imaging in guiding treatment decisions.

Main Methods:

• Review of current literature on acute ischemic stroke and reperfusion therapies.
• Analysis of the physiological concept of the ischemic penumbra.
• Evaluation of the utility of advanced imaging techniques (MRI, CT) in identifying the penumbra.
• Discussion of evidence supporting extended treatment windows based on penumbra imaging.

Main Results:

• A significant proportion of stroke patients have a salvageable penumbra beyond traditional time limits.
• Advanced imaging can accurately identify patients with a substantial penumbra.
• Penumbra-guided therapy can lead to improved patient outcomes.
• Modern imaging systems facilitate personalized stroke treatment.

Conclusions:

• Identifying the ischemic penumbra using advanced imaging offers a physiological basis for expanding acute ischemic stroke treatment.
• This approach can increase the number of eligible patients and improve functional outcomes.
• An evidence-based, penumbra-guided strategy represents a promising alternative to current acute stroke management protocols.