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KMID : 1151820200140060733
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Journal of the Korean Society of Radiology
2020 Volume.14 No. 6 p.733 ~ p.740
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Shielding Capability Evaluation of Slit-shaped Structure for Scattered X-ray using Monte Carlo Meth
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Kim Sang-Rok
Heo Jae-Seung
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Abstract
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As the use of radiation for medical purposes increases, the exposure dose of medical workers is also increasing. To reduce this dose, various studies on changing the shielding material have been conducted. Recently, a new method to reduce the dose at the entrance of the radiation treatment room was proposed by using the photoelectric effect that occurs when the radiation is scattered. Because this method is particularly effective for low-energy photons, in this study, a slit-type structure was proposed as a excellent shielding structure against scattered x-ray in a general photography room, and was evaluated the shielding effect by Monte Carlo simulation. As a result of the calculation, this study found that in the case of a structure in which steel plates with a thickness of 2 mm and a width of 5 cm are stacked at 2 mm intervals, a shielding effect was approximately 99.9% or more, excluding the heights of the floor and the patient where scattering occurs directly.
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KEYWORD
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Radiation, Scattered X-ray, Shielding, Monte Carlo simulation, Photoelectric effect
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