Instrument independent diffuse reflectance spectroscopy. J Biomed Opt 2011;16(1):011010
Date
02/02/2011Pubmed ID
21280897Pubmed Central ID
PMC3041242DOI
10.1117/1.3524303Scopus ID
2-s2.0-79955386810 (requires institutional sign-in at Scopus site) 33 CitationsAbstract
Diffuse reflectance spectroscopy with a fiber optic probe is a powerful tool for quantitative tissue characterization and disease diagnosis. Significant systematic errors can arise in the measured reflectance spectra and thus in the derived tissue physiological and morphological parameters due to real-time instrument fluctuations. We demonstrate a novel fiber optic probe with real-time, self-calibration capability that can be used for UV-visible diffuse reflectance spectroscopy in biological tissue in clinical settings. The probe is tested in a number of synthetic liquid phantoms over a wide range of tissue optical properties for significant variations in source intensity fluctuations caused by instrument warm up and day-to-day drift. While the accuracy for extraction of absorber concentrations is comparable to that achieved with the traditional calibration (with a reflectance standard), the accuracy for extraction of reduced scattering coefficients is significantly improved with the self-calibration probe compared to traditional calibration. This technology could be used to achieve instrument-independent diffuse reflectance spectroscopy in vivo and obviate the need for instrument warm up and post∕premeasurement calibration, thus saving up to an hour of precious clinical time.
Author List
Yu B, Fu HL, Ramanujam NAuthor
Bing Yu PH.D. Assistant Professor of Biomedical Engineering in the Biomedical Engineering department at Marquette UniversityMESH terms used to index this publication - Major topics in bold
Computer-Aided DesignEquipment Design
Equipment Failure Analysis
Fiber Optic Technology
Lighting
Pattern Recognition, Automated
Photometry
Reproducibility of Results
Sensitivity and Specificity
Spectrophotometry, Ultraviolet
