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1 September 2009 Tissue characterization with ballistic photons
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Abstract
We propose tissue characterization with ballistic photons, those whose direction or propagation speed is not affected by the presence of tissue. The most critical aspect of the tissue characterization problem is calibration of experimental measurements. The calibration method relates the fringe irradiance (power modulation in one interferometer arm) with the sample concentration under controlled conditions. During this step, the absorption and scattering indices βa and βsc are determined as a function of concentration for each material or tissue of interest, using a set of containers to vary travel distance D. It is assumed that linear scattering coefficient, ksc (absorption coefficient, αa), is proportional to the number of scattering particles per unit volume, or particle concentration, c, in [ml/l]. Attenuation is proportional to concentration of scattering (absorption) centers and the sample length. The sensitivity of method is estimated at 10-19 with uncoated plate beam-splitters and intensified photon-counting detector.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marija Strojnik and Gonzalo Paez "Tissue characterization with ballistic photons", Proc. SPIE 7453, Infrared Spaceborne Remote Sensing and Instrumentation XVII, 74530Y (1 September 2009); https://doi.org/10.1117/12.826767
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