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KMID : 0357520190420030175
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Journal of Radiological Science and Technology
2019 Volume.42 No. 3 p.175 ~ p.180
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Analysis of Scatter Ray Distribution Using GEANT4-GATE Simulation and Effectiveness of Silicone Pad in Digital Mammography
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Kim Myeong-Soo
Kim Young-Keun
Jang Young-Il
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Abstract
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In this study, we have researched the effectiveness of silicone pad. A distribution of scatter ray in mammography was evaluated using Monte-Carlo (MC) simulation technique and then a silicone pad was applied to remove the scatter ray for improving image quality. Molybdenum target and Molybdenum filter combination made a difference of 59.8% to a number of photon at 17.5 keV. On the other hand, Tungsten target and Rhodium filter showed a variation of 24.5% at 20 keV. Mean 68 of SNR was increased in Selenia and mean 1.04 of SNR was raised in Senographe. Silicone pad was significantly effective to reduce the scatter ray that was generated by primary X-ray. It can decrease an absorption rate of scatter ray to patient body and whilst it improve the image quality from increasing SNR.
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KEYWORD
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Digital Mammography, Monte-Carlo simulation, Scatter ray, Silicone pad, Signal to noise ratio(SNR)
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