Time-resolved spectrally constrained method for the quantification of chromophore concentrations and scattering...

Area of Science:

• Biomedical Optics
• Photonic Technologies
• Medical Imaging

Background:

• Accurate quantification of tissue optical properties is crucial for various biomedical applications.
• Conventional methods for assessing chromophore concentrations and scattering parameters face limitations, particularly in low signal-to-noise scenarios.

Purpose of the Study:

• To introduce and validate a novel time-resolved spectral fitting analysis for direct assessment of chromophore concentrations and scattering parameters.
• To demonstrate the robustness and improved performance of the new method compared to existing techniques.

Main Methods:

• Development of a time-resolved spectral fitting analysis algorithm.
• Experimental validation using tissue-simulating phantoms and in vivo measurements.
• Acquisition of experimental data using a broadband system with supercontinuum light and a 32-channel Time Correlated Single Photon Counting (TCSPC) system.

Main Results:

• Successful experimental validation of the time-resolved spectral fitting analysis on phantoms and in vivo.
• Demonstration of direct assessment of chromophore concentrations and scattering parameters.
• The novel method exhibits enhanced robustness, particularly under low signal-to-noise conditions, outperforming conventional techniques.

Conclusions:

• The developed time-resolved spectral fitting analysis provides a robust and accurate method for quantifying tissue optical properties.
• This technique offers significant advantages over conventional methods, especially in challenging low signal environments.
• The validated approach holds promise for advancing biomedical optics and optical diagnostic applications.