Fig. 9.

Combined imaging of OCT attenuation and backscattering coefficient of a fibrocalcific plaque. (a) and (b) Images of histology and OCT attenuation coefficient. (c) Image of the combined attenuation and backscattering coefficient using the colormap in (d). C, calcific tissue; F, fibrous tissue; L, lipid tissue. The three tissue types led, respectively, to attenuation coefficients of $5.7\pm 1.4{\mathrm{mm}}^{-1}$, $6.4\pm 1.2{\mathrm{mm}}^{-1}$, and $13.7\pm 4.5{\mathrm{mm}}^{-1}$; and backscattering coefficients of $4.9\pm 1.5{\mathrm{mm}}^{-1}$, $18.6\pm 6.4{\mathrm{mm}}^{-1}$, and $28.2\pm 8.9{\mathrm{mm}}^{-1}$, respectively. Adapted from Ref. 8.