Development of NIRS probe based on LED sensing that enables multimodal integration

Area of Science:

• Biomedical Engineering
• Optical Sensing Technologies
• Medical Diagnostics

Background:

• Near-infrared spectroscopy (NIRS) systems are valuable for non-invasive physiological monitoring.
• Current NIRS systems face challenges in miniaturization and sensor symmetry.
• Developing novel sensing modalities is crucial for advancing NIRS technology.

Purpose of the Study:

• To introduce and validate LED sensing as a method for NIRS.
• To investigate the spectral characteristics of LEDs for accurate NIRS measurements.
• To establish a formula for calculating hemoglobin concentration changes using LED sensing.

Main Methods:

• Investigated the spectral responses of Light Emitting Diodes (LEDs).
• Developed a formula to calculate changes in hemoglobin concentrations based on LED spectral data.
• Conducted experiments using a blood phantom with continuous-wave NIRS (CW-NIRS) and LED sensing.

Main Results:

• Demonstrated that LED sensing enables miniaturization and symmetrization of NIRS systems.
• Established a reliable method for calculating temporal changes in hemoglobin concentrations.
• Validated the effectiveness of LED sensing in a controlled blood phantom environment.

Conclusions:

• LED sensing is a viable approach for developing practical, miniaturized, and symmetrical NIRS sensors.
• The established formula and experimental validation support the use of LED sensing for monitoring hemoglobin dynamics.
• This technology holds promise for improved non-invasive physiological monitoring and medical diagnostics.