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KMID : 1151820180120050549
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Journal of the Korean Society of Radiology
2018 Volume.12 No. 5 p.549 ~ p.555
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The Study on Scattered Radiation Effects According to Acquisition of X-ray Imaging using Monte Carlo Simulation
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Park Ji-Koon
Kang Sang-Sik
Yang Seung-Woo
Heo Ye-Ji
Kim Kyo-Tae
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Abstract
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The medical imaging technique images the contrast formed based on the difference in absorption coefficient of X-rays which changes according to the composition and thickness of the object. At this time, not only primary rays entering the image detector but also scattered rays greatly affect the image quality. Therefore, in this paper, Forward scattering rate and Scattered to primary ratio analysis were performed through Monte Carlo simulation in order to consider influence of scattered ray generated according to object thickness and radiation exposure area change on image quality. In the study, the Forward scattering rate corresponding to the thickness of the object was analyzed at a maximum of 15.3%p and the Scattered to primary ratio was analyzed at 2.00 to 4.54, but it was analyzed as maintaining a constant value for radiation exposure area change. Based on these results, the thickness of the object should be considered as a factor influencing the quality of the image, but radiation exposure area verified that it is a factor that does not affect the image quality. We believe that the results of this research can be utilized as basic information of scattered radiation to improve image quality.
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KEYWORD
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Monte carlo simulation, Image quality, ANSI chest phantom, Forward scattering rate, Scattered to primary ratio
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