Hybrid Monte Carlo CT Simulation on GPU

Gabor Jakab, Laszlo Szirmay-Kalos
Budapest University of Technology and Economics, Hungary
Lecture Notes of Computer Science (LSSC’13), 2013


   title={Hybrid Monte Carlo CT Simulation on GPU},

   author={Jakab, G{‘a}bor and Szirmay-Kalos, L{‘a}szl{‘o}},



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Developing image reconstruction algorithms for diagnostic medical devices requires physically accurate and effective simulation tools. In this paper we present a hybrid Monte Carlo (MC) particle simulation method for Computed Tomography (CT) scanners. To meet the performance requirements, we combine several variance reduction techniques and tailor the algorithms for effective GPU execution. Variance reduction methods include main part separation, sample weighting, reuse, forced collision, next event estimation and table driven importance sampling. We show that the resulting method can deliver accurate simulations orders of magnitude faster than direct physical simulation.
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