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Combined Near-infrared Fluorescent Imaging and Micro-computed Tomography for Directly Visualizing Cerebral Thromboemboli

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Microvascular imaging in acute ischemic stroke.

Günter Seidel¹, Florian Roessler, Mohamed Al-Khaled

¹Department of Neurology, Asklepios Klinik Nord-Heidberg, Hamburg, Germany. g.seidel@asklepios.com

Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging

|November 20, 2012

Summary

Bedside microvascular imaging (MVI) effectively assesses brain perfusion in acute ischemic stroke (AIS) patients. This ultrasound technique aids in diagnosing stroke and predicting patient prognosis within hours of symptom onset.

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Integrated Photoacoustic, Ultrasound, and Angiographic Tomography (PAUSAT) for NonInvasive Whole-Brain Imaging of Ischemic Stroke

Integrated Photoacoustic, Ultrasound, and Angiographic Tomography (PAUSAT) for NonInvasive Whole-Brain Imaging of Ischemic Stroke

Published on: June 2, 2023

Area of Science:

Neurology
Medical Imaging
Ultrasound Technology

Background:

Microvascular imaging (MVI) is an emerging ultrasound technology for bedside assessment of brain perfusion.
Acute ischemic stroke (AIS) requires rapid and accurate diagnostic and prognostic evaluation.

Purpose of the Study:

To evaluate the diagnostic and prognostic value of MVI in patients with AIS.
To assess the correlation between MVI-derived perfusion deficits and stroke outcomes.

Main Methods:

Nineteen AIS patients were studied within 12 hours of symptom onset using a Philips iU22 system and SonoVue contrast agent.
The area of maximal perfusion deficit (AMPD) was quantified.
AMPD was compared with infarction on follow-up CT and NIHSS scores at 24 hours.

Main Results:

MVI provided sufficient insonation in 79% of patients.
Ultrasound perfusion imaging demonstrated 91% sensitivity and 67% specificity for detecting infarctions.
Significant correlations were found between AMPD and 24-hour NIHSS scores (P=.023) and internal carotid artery occlusion (P=.005).

Conclusions:

Bedside MVI in the early phase of AIS offers valuable insights into brain parenchyma perfusion.
MVI provides prognostic information for patients with acute ischemic stroke.