 In the search for means to enhance the surveillance of BE, optical spectroscopy is emerging as a candidate with high potential. Optical spectroscopic techniques measure specific light-tissue interactions, such as fluorescence, elastic scattering, and Raman inelastic scattering, which provide objective and quantitative diagnostic information about the molecular andor structural status of tissue. Moreover, optical spectroscopy has the capacity to identify tissue pathology in situ in a rapid and non-destructive fashion. Among the optical spectroscopic techniques, near-infrared Raman spectroscopy NIRS is particularly promising because of the wealth of molecular-specific information contained in its spectra 