[Research on serum prostate-specific antigen measurement by characteristic spectral imaging method]

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Medical Diagnostics

Context:

• Prostate-specific antigen (PSA) is a key biomarker for prostate cancer screening and monitoring.
• Accurate and accessible PSA measurement methods are crucial for early detection and effective patient management.
• Existing methods may have limitations in terms of cost, accessibility, or precision.

Purpose:

• To develop and validate a novel serum PSA measurement method utilizing spectral imaging and immunochromatography.
• To assess the feasibility and accuracy of the proposed method for quantifying PSA levels in blood samples.
• To establish the correlation between spectral imaging-derived characteristic values and actual PSA concentrations.

Summary:

• A new method combines spectral imaging with colloidal gold-marked test-strips for serum PSA measurement.
• An LED light source and CCD camera capture test-strip images, analyzed by software for characteristic values.
• Cubic polynomial fitting established a relationship between characteristic values and PSA levels, showing a correlation coefficient of 0.924 with true values.

Impact:

• The proposed spectral imaging method offers a feasible approach for serum PSA level measurement.
• The technique shows higher accuracy for PSA levels below 25 ng/mL, indicating potential for sensitive detection.
• This innovation could lead to more accessible and potentially cost-effective PSA diagnostics.