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Development of a GPU-based multithreaded software application to calculate digitally reconstructed radiographs for radiotherapy

Shinichiro Mori, Masanao Kobayashi, Motoki Kumagai, Shinichi Minohara
Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, 4-9-1 Anagawa, Chiba, Japan
Radiological Physics and Technology, Volume 2, Number 1, 40-45

@article{mori2009development,

   title={Development of a GPU-based multithreaded software application to calculate digitally reconstructed radiographs for radiotherapy},

   author={Mori, S. and Kobayashi, M. and Kumagai, M. and Minohara, S.},

   journal={Radiological Physics and Technology},

   volume={2},

   number={1},

   pages={40–45},

   issn={1865-0333},

   year={2009},

   publisher={Springer}

}

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To provide faster calculation of digitally reconstructed radiographs (DRRs) in patient-positioning verification, we developed and evaluated a graphic processing unit (GPU)-based DRR software application and compared it with a central processing unit (CPU)-based application. The evaluation metrics were calculation speed and image quality for various slice thicknesses. The results showed that the GPU-based DRR computation was an average of 50 times faster than the CPU-based methodology, whereas the image quality was very similar. This excellent performance may increase the accuracy of patient positioning and improve the patient treatment throughput time.
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