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Detection and Isolation of Cancer in Prostate Biopsies Using Stimulated Raman Histology and Artificial Intelligence
Published on: June 10, 2025
Stokes shift spectroscopy pilot study for cancerous and normal prostate tissues.
J Ebenezar1, Yang Pu, W B Wang
1PG & Research Department of Physics, Jamal Mohamed College, Tiruchirappalli, Tamilnadu 620020, India.
Applied Optics
|June 15, 2012
Summary
Stokes shift spectroscopy (S3) shows promise for cancer detection. This study found S3 accurately distinguishes cancerous from normal prostate tissue with 100% sensitivity and specificity using distinct spectral peaks.
Area of Science:
- Biomedical Optics
- Spectroscopy
- Cancer Diagnostics
Background:
- Cancer detection relies on accurate diagnostic methods.
- Emerging spectroscopic techniques offer potential for improved cancer diagnosis.
Purpose of the Study:
- To evaluate Stokes shift spectroscopy (S3) for detecting and characterizing normal versus cancerous prostate tissues.
- To assess the diagnostic accuracy of S3 in prostate cancer detection.
Main Methods:
- Collected paired normal and cancerous prostate tissue samples from eight patients.
- Measured Stokes shift spectra with a fixed wavelength interval (Δλ=20 nm).
- Analyzed spectral differences in the 250-600 nm region and computed spectral ratios.
Main Results:
- Observed distinct spectral peaks for normal and cancerous tissues around 300 nm (tryptophan), 345 nm (collagen), 440 nm (NADH), and 510 nm (flavin).
- Developed two spectral ratios (R1=I297/I345 and R2=I307/I345) to quantify differences.
- Achieved 100% sensitivity and 100% specificity in distinguishing cancerous from normal tissue using these ratios.
Conclusions:
- Stokes shift spectroscopy (S3) is a highly sensitive and specific technique for prostate cancer detection.
- S3 provides distinct spectral signatures enabling accurate differentiation of cancerous and normal prostate tissues.
- The computed spectral ratios demonstrate excellent diagnostic potential for S3 in prostate cancer diagnostics.
