ETS: Emission Tomography Simulator

ETS is a Monte Carlo simulation code for tomography applications based on PTSIM. Through a modular object oriented approach ETS maintains the efficiency of specialized solutions while incorporating features common to general Monte Carlo particle transport simulation packages, such as the presence of a comprehensive geometrical modeling subsystem.

The simulation of photon history through a heterogeneous medium is treated as a distinct case of particle transport, rather than a geometrical representation problem, leading to efficient tracing through voxel-based anthropomorphic phantoms. The approach is general and flexible allowing for a mixed voxel and surface based representation of the attenuation distribution (similarly for the activity distribution). Various variance reduction techniques are introduced. More details are given in [1].

Bibliography

1. L.M. Popescu and R.M. Lewitt, "A versatile approach for Monte Carlo simulation of tomographic systems," IEEE Nucl. Sci. Symp. & Med. Img. Conf., 2003 Portland, vol. 4, pp. 2785-2788, (conference record paper)