A "one-stop-shop" 4D CTA protocol using 320-row CT for advanced imaging in acute ischemic stroke: a technical note

Area of Science:

• Radiology
• Medical Imaging
• Neurology

Background:

• Acute ischemic stroke requires rapid and comprehensive diagnostic imaging for timely intervention.
• Conventional imaging protocols may involve multiple scans, increasing time and resource utilization.

Purpose of the Study:

• To describe a novel, integrated CT scan protocol for evaluating acute ischemic stroke.
• To detail acquisition and reconstruction parameters for optimizing diagnostic yield.

Main Methods:

• Utilized a 320-row area detector CT scanner for a single acquisition protocol.
• Included non-enhanced CT, dynamic CT angiography (CTA), and whole-brain perfusion imaging.
• Employed model-based iterative reconstruction (MBIR), time summing (tMIP), and subtraction techniques.

Main Results:

• Achieved comprehensive brain perfusion, dynamic angiography, and supra-aortic trunk angiography in one scan.
• Demonstrated optimization of results using MBIR, tMIP, and subtraction techniques.
• Protocol provides a complete diagnostic workup for acute ischemic stroke.

Conclusions:

• The novel CT protocol offers a streamlined, single-acquisition solution for acute ischemic stroke assessment.
• This integrated approach provides essential diagnostic information with reasonable radiation dose and reduced contrast volume.
• Facilitates quicker clinical decision-making in acute ischemic stroke patients.