Figure 5
(A) MC simulation of one-hundred 10 keV photons of a parallel beam (unpolarized, FWHM = 1 µm) which are constrained to interact in a 10 µm-thick layer of soft tissue (EGSnrc: option photon forcing enabled). Photon tracks are shown in green, electron tracks in blue. (B) Photon attenuation of photons in soft tissue according to the Beer–Lambert law = plotted for different photon energies E on a semi-logarithmic scale. For energies above 10 keV, attenuation can be neglected if the sample thickness is less than about 100 µm. |