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KMID : 0357520190420010025
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Journal of Radiological Science and Technology
2019 Volume.42 No. 1 p.25 ~ p.30
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Measurement of Breast Skin Dose According to Shield Thickness During Whole Spine Scanography Using Digital Radiography System
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Nam Soon-Kwon
Choi Joon-Ho
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Abstract
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Whole Spine Scanography (WSS) using the Digital Radiography (DR) system is an examination that requires whole body X-ray exposure, which involves more exposure to radiation for patients than other general radiographies. This can affect the occurrence of breast cancer. This research measured radiation dose when breasts were shield and not shield using the Auto Exposure Control (AEC) mode. The radiation dose without a shield was 1.540mGy, and that using a collimator was measured 0.506 mGy. Moreover, 0.733mGy was measured when 1 shield (0.3 mm) was used, and 0.523 μGy when 5 of them (1.5 mm) were used. The results showed that the radiation dose with 5 shields and the radiation dose with a collimator were similar. Moreover, 0.233mGy was measured when 8 shields (2.4 mm) were used. The standard deviation were 0.081 when using collimator and 0.014 when 5 shields were used. Also, when 8 shields were used, it was found to be 0.002. Most patients who go under a scoliosis test are children or young people who are highly sensitive to radiation. In the research results, the case where the organs sensitive to radiation, women’s breasts, were shielded showed more distinct differences compared to without shields. It is considered that using shields can provide more constant shield than using a collimator and lower the risk of breast cancer caused by exposure to radiation.
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KEYWORD
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Digital Radiography, Whole Spine Scanography, Auto Exposure Control, Collimator, Source Skin Distance(SSD)
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