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. Author manuscript; available in PMC: 2011 Sep 3.
Published in final edited form as: Phys Med Biol. 2008 Mar 26;53(8):2069–2088. doi: 10.1088/0031-9155/53/8/005

Figure 1.

Figure 1

(a) FSDS source illustration: Rays are traced from the source position rs to every position in the meshed volume r for describing the uncollided photon distribution, which sets up the volume source for scattered photons. (b) Last collided integration at the detector: once the source iterations for solving the angular flux in the domain have converged, the detected flux is calculated by integrating along the rays from the detector position rd towards the points r in the domain which are in the FOV of the detector.