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Volume concentration and size dependence of diffuse reflectance in a fractal soft tissue model
Author(s) -
Sharma S. K.,
Banerjee Srilekha
Publication year - 2005
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1925807
Subject(s) - diffuse reflection , fractal , fractal dimension , optics , volume (thermodynamics) , diffuse reflectance infrared fourier transform , materials science , reflectivity , range (aeronautics) , physics , chemistry , mathematics , mathematical analysis , biochemistry , quantum mechanics , photocatalysis , composite material , catalysis
Employing a fractal model for the particle size distribution, we examine the possibility of relating the size/volume concentration changes in the tissue to its diffuse reflectance. It is noted that for the practically interesting range of fractal dimension values α , the curves depicting the variation of diffuse reflectance (the ratio of diffuse reflectance at two suitably chosen source detector separations) with α at fixed volume concentrationT v , are single valued. The same is true if α is fixed andT vis varied. This crucial observation shows that it should be possible to identify changes in the size/volume concentration of the tissue from the diffuse reflectance measurement at two source detector separations when either α orT vis a priori known. Similar results have been obtained for ratio of fluence measured at two suitably chosen depths within the tissue.