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- W2761194617 abstract "Introduction Monte Carlo simulation (MC) is a major type of model-based dose calculation algorithm (MBDCA) in Brachytherapy. However, due to the large number of primary beams (usually hundreds of millions or more) as needed to obtain small statistical errors, MC is usually not practical in clinical applications. Recently, there arise several NVIDIA CUDA-based graphic processing unit (GPU) MC codes that accelerate the simulation such that they suffice clinical requirements in certain situations. In this work, an Open-CL-based MC code that targets Brachytherapy dose calculations, OpenTRAK, was presented. Methods OpenTRAK implements all photon interactions (photoelectric effect, compton scatter, rayleigh scatter and pair-production) and computes the spatial energy-fluence distribution. The linear track estimator was then used to calculate the collisional kerma (Dm,m) distribution in phantom. OpenTRAK was preliminarily benchmarked against ALGEBRA, a GEant4-based BRAchytherapy dose calculation code [1] , by using a MicroSelectronV2 Ir-192 HDR source. The source phasespace files had been prepared before dose calculations and were used as input for both MC codes. As an preliminary test, a single source was placed in the centre of a uniform water phantom with dimension of 200 × 200 × 200 mm3 with its longitudinal axis aligned with the z-axis of the phantom. Dose ratio map ( D OpenTRAK / D ALGEBRA ) was generated and used for comparison analysis. The codes were run in a Mac Pro with two AMD FirePro D700 GPUs (for OpenTRAK) and a 2.7 GHz 12-Core Intel Xeon E5 CPU (ALGEBRA). Results The ratio map shows that the codes are consistent with each other with Conclusion An OpenCL-based MC code for brachytherapy dose calculation was implemented and preliminarily tested. The code itself needs further fine-tuning/corrections in order to maximize its GPU acceleration. Further benchmarks are planned including source TD-43 parameters extraction, real patient test cases, etc." @default.
- W2761194617 created "2017-10-20" @default.
- W2761194617 creator A5038912115 @default.
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- W2761194617 date "2017-10-01" @default.
- W2761194617 modified "2023-09-23" @default.
- W2761194617 title "Abstract ID: 186 OpenTRAK: An OpenCL-based GPU Monte Carlo simulation code for Brachytherapy dose calculation" @default.
- W2761194617 cites W1981020690 @default.
- W2761194617 doi "https://doi.org/10.1016/j.ejmp.2017.09.098" @default.
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