Advanced neuroimaging to guide acute stroke therapy

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Non-contrast CT is the traditional first-line imaging for acute stroke.
• It effectively identifies candidates for reperfusion therapy within 3 hours if no hemorrhage is present.
• However, non-contrast CT has limitations in selecting optimal candidates outside this narrow time window.

Purpose of the Study:

• To evaluate advanced imaging techniques for identifying acute ischemic stroke reperfusion therapy candidates.
• To determine the utility of CT and MR angiography in characterizing vascular lesions.
• To assess the role of CT and MRI perfusion imaging in estimating ischemic core and penumbra.

Main Methods:

• Utilized non-invasive CT angiography and MR angiography for vascular lesion identification.
• Employed CT-based perfusion imaging and MRI-based diffusion and perfusion imaging.
• Evaluated imaging findings to estimate the extent of fixed core and penumbra in ischemic lesions.

Main Results:

• Advanced imaging techniques successfully identify reperfusion therapy candidates beyond the 3-hour window.
• CT/MR angiography characterizes vascular lesions like occlusions, aneurysms, and malformations.
• Perfusion imaging quantifies ischemic core and penumbra, crucial for treatment selection.

Conclusions:

• Advanced imaging, including CT/MR angiography and perfusion techniques, improves selection of acute ischemic stroke patients for reperfusion therapy.
• Identifying patients with small infarct cores and large penumbra is key for successful treatment.
• These methods enhance therapeutic decision-making, especially for patients presenting outside the early time window.