Diffuse correlation spectroscopy for non-invasive, micro-vascular cerebral blood flow measurement

Area of Science:

• Biomedical Optics
• Neuroscience
• Medical Instrumentation

Background:

• Diffuse Correlation Spectroscopy (DCS) is a non-invasive optical technique.
• It measures cerebral blood flow (CBF) by analyzing near-infrared light fluctuations.
• DCS has a history of brain applications, with established physical principles, instrumentation, and validation methods.

Purpose of the Study:

• To provide a historical overview of DCS in brain research.
• To describe the physical principles, instrumentation, and validation of DCS for CBF measurement.
• To present recent clinical research utilizing DCS-measured CBF.

Main Methods:

• Review of historical DCS applications in neuroscience.
• Description of the physical principles behind DCS light-tissue interaction.
• Overview of common DCS instrumentation and validation techniques.
• Summary of recent clinical studies employing DCS for CBF assessment.

Main Results:

• DCS has a foundational history in brain research.
• The technique relies on analyzing temporal fluctuations of near-infrared light.
• Recent studies validate DCS-measured CBF as a biomarker for patient well-being.
• DCS effectively indicates hemodynamic and metabolic responses to functional stimuli.

Conclusions:

• Diffuse Correlation Spectroscopy is a validated non-invasive method for measuring cerebral blood flow.
• DCS serves as a valuable biomarker for patient well-being.
• The technique is crucial for understanding brain hemodynamic and metabolic responses.