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9 March 2018 Scatter profiles of the MIRD phantom with Geant4
M. Buğrahan Oktay, Frederic Noo
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Proceedings Volume 10573, Medical Imaging 2018: Physics of Medical Imaging; 105732Y (2018) https://doi.org/10.1117/12.2293737
Event: SPIE Medical Imaging, 2018, Houston, Texas, United States
Abstract
Scatter is an important source of image artifacts in cone beam computed tomography. In this study, we investigate the complexity of the scatter signal using Monte Carlo simulations with the anthropomorphic MIRD phantom. We assess the differences in scatter intensities for two angular positions of the source at a given bed position. We identified the contribution of single-scatter (coherent and in-coherent) to total-scatter signal as well as the relative contribution multiple scatter events, and we also identified the scatter-to-primary ratio (SPR). Simulations were performed at different monochromatic beam energies ranging from 40 keV to 120 keV.
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M. Buğrahan Oktay and Frederic Noo "Scatter profiles of the MIRD phantom with Geant4", Proc. SPIE 10573, Medical Imaging 2018: Physics of Medical Imaging, 105732Y (9 March 2018); https://doi.org/10.1117/12.2293737
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KEYWORDS
X-rays
Monte Carlo methods
X-ray sources
Computed tomography
Physics
X-ray computed tomography
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