Figure 6
A-scans in co- (a) and cross-polarizations (b) of a white matter sample on a logarithmic scale (blue lines) and corresponding linear fits (red lines). The attenuation in co-polarization is 4.9 mm−1, and the attenuation in cross-polarization is 3.0 mm−1. The difference in attenuation coefficients in both polarizations is believed to be caused by forward cross-scattering and is used as a second optical characteristic of the tissue.
