Journal of Medical Physics
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Year : 2010  |  Volume : 35  |  Issue : 2  |  Page : 120-122

Applying graphics processor units to Monte Carlo dose calculation in radiation therapy

1 Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
2 Department of Physics and Center for Computational Research, University at Buffalo, SUNY, Buffalo, NY 14260, USA
3 Computer Science and Engineering, University at Buffalo, SUNY, Buffalo, NY 14260, USA

Correspondence Address:
M Bakhtiari
Radiation Medicine Department, Roswell Park Cancer Institute, Buffalo, NY 14263
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0971-6203.62198

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We investigate the potential in using of using a graphics processor unit (GPU) for Monte-Carlo (MC)-based radiation dose calculations. The percent depth dose (PDD) of photons in a medium with known absorption and scattering coefficients is computed using a MC simulation running on both a standard CPU and a GPU. We demonstrate that the GPU's capability for massive parallel processing provides a significant acceleration in the MC calculation, and offers a significant advantage for distributed stochastic simulations on a single computer. Harnessing this potential of GPUs will help in the early adoption of MC for routine planning in a clinical environment.

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