Dissecting Multiparametric Cerebral Hemodynamics using Integrated Ultrafast Ultrasound and Multispectral...

Area of Science:

• Neuroscience
• Biomedical Engineering
• Medical Imaging

Background:

• Studying brain-wide hemodynamic responses is crucial for understanding brain functions and neuro-disorders.
• Existing brain imaging technologies lack the necessary resolution, sensitivity, and depth to capture comprehensive hemodynamic data.
• Current methods often provide information on only one or two hemodynamic parameters, limiting detailed analysis.

Approach:

• Developed a compact, head-mountable multimodal functional ultrasound and photoacoustic (fUSPA) imaging platform.
• Integrated ultrafast ultrasound and multispectral photoacoustic imaging for quantitative mapping.
• Enabled high spatiotemporal resolution imaging of cerebral blood volume (CBV), cerebral blood flow (CBF), and oxygen saturation (SO2).

Key Points:

• The fUSPA system was systematically characterized and applied to study brain hemodynamics and vascular reactivity.
• Hypercapnia stimulation revealed an overall increase in brain-wide CBV, CBF, and SO2.
• Observed regional differences in cortical veins and arteries, along with a reproducible anti-correlation between venous and cortical hemodynamics.

Conclusions:

• The fUSPA system provides multiparametric cerebrovascular information with high resolution and sensitivity.
• This technology can offer valuable insights into the complex mechanisms underlying neurodiseases.
• The platform demonstrates significant potential for advancing brain function and neuro-disorder research.