Performance assessment of probe-based Raman spectroscopy systems for biomedical analysis

Area of Science:

• Biomedical Spectroscopy
• Analytical Chemistry

Background:

• Accurate performance evaluation of Raman spectroscopy systems is crucial for reliable biomedical analysis.
• Current methods for measuring signal quality are often inconsistent and difficult to compare across different systems.

Purpose of the Study:

• To develop a standardized methodology for evaluating probe-based Raman spectroscopy systems for biomedical applications.
• To establish a reliable and reproducible method for comparing the signal quality of different Raman spectroscopy systems.

Main Methods:

• Utilized dairy milk as a biological standard due to its tissue-like spectral properties and homogeneity.
• Implemented a data analysis approach including model-based correction for photobleaching artifacts to calculate signal-to-noise ratio (SNR).

Main Results:

• The proposed methodology yielded experimental SNR values that closely matched theoretical predictions, outperforming current methods.
• Significant variations in throughput and stray light rejection were observed among four tested imaging spectrographs, impacting their biological Raman spectra detection capabilities.

Conclusions:

• The developed methodology provides a robust and accurate means for evaluating Raman spectroscopy systems for biomedical analysis.
• This standardized approach can be adapted for system optimization, inter-probe variability assessment, and subcomponent analysis to enhance signal quality.