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KMID : 0357520170400030377
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Journal of Radiological Science and Technology
2017 Volume.40 No. 3 p.377 ~ p.383
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A Study on the Distribution of Scatter Ray in Chest Radiography of a Health Examination Bus
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Cho Ji-Hwan
Jin Seong-Jin
Min Byung-In
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Abstract
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The purpose of this study was to evaluate the distribution of spatial scatter ray on the chest radiographs of patients on health examination bus. In this paper, we propose a method for minimize unnecessary exposure by measuring the scattered dose after exposure the actual subject and comparing the body mass index (BMI) with the tube current amount mAs. The results of this study showed that the mean BMI of the subjects was 23.31±3.12. The mean mAs value was 2.92±1.19, which males was higher than females. The mean value of the scatter ray at position 1 in the radiography room was 771.81±151.15 μ㏜/hr. The mean value of the scatter rays at the position 2 outside the entrance of the radiography room was measured as 53.86±25.66 μ㏜/hr. As the BMI and mAs was increase the spatial scatter dose was increased at position 1 and position 2 in the photographing room. In order to minimize the exposure dose of scatter ray, radiation workers should shoot the radiation as low as possible within the range that does not impair the quality of the image. It will be necessary to make efforts to not wait for a waiting person near the entrance door of the photographing room.
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KEYWORD
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spatial scatter ray , health examination bus , body mass index (BMI) , mAs , chest radiograph
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