방사선 검사 시 2차 누출 방사선에 대한 연구
A Study on Leakage Radiation in Radiographic Examination
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During radiological examination, exposure should be minimized, and there should be nounnecessary exposure. But, 93 out of 100 radiation workers who examine with the control room dooropen were identified. The purpose of this study was to investigate the effect on radiation workers bymeasuring the scattering ray, leakage ray with an active dosimeter during radiological examination withthe control room door open. Among the five tests frequently performed in upper hospitals, two wereidentified, chest and spine. To study the difference according to the equipment, Listem’s Analog andGemss-medical’s Digital Radiography equipment were used. Control room door opening angles of 25°,50°, 75°, 100°, Measurements were made by changing the conditions by setting the distance from thedoor to 25 cm, 50 cm, and 100 cm. It was measured 10 times and represented by standard deviation, andChest, both instruments measured values below the radiation control area. Spine measurement result25 cm, 100 degree A device 2,325±33.6 μSv w-1, D device 2,572±38.4 μSv w-1 maximum measurement, Theminimum value was measured at 100 cm 25 degrees A device 159±16.4 μSv w-1 and D device 325±27.6. Except for 5 of the 24 conditions, all of them exceed the radiation control area. As a result of the study, it canbe seen that the annual dose limit is exceeded by converting the unit of the maximum value to 128.6±1.92mSv y-1. As the distance increases and the opening angle of the control room door decreases, the scatteringray, leakage ray decreases. Considering the probabilistic effects recommended in ICRP 103, it isjudged that continuous education for radiation workers is necessary.
Abstract
During radiological examination, exposure should be minimized, and there should be nounnecessary exposure. But, 93 out of 100 radiation workers who examine with the control room dooropen were identified. The purpose of this study was to investigate the effect on radiation workers bymeasuring the scattering ray, leakage ray with an active dosimeter during radiological examination withthe control room door open. Among the five tests frequently performed in upper hospitals, two wereidentified, chest and spine. To study the difference according to the equipment, Listem’s Analog andGemss-medical’s Digital Radiography equipment were used. Control room door opening angles of 25°,50°, 75°, 100°, Measurements were made by changing the conditions by setting the distance from thedoor to 25 cm, 50 cm, and 100 cm. It was measured 10 times and represented by standard deviation, andChest, both instruments measured values below the radiation control area. Spine measurement result25 cm, 100 degree A device 2,325±33.6 μSv w-1, D device 2,572±38.4 μSv w-1 maximum measurement, Theminimum value was measured at 100 cm 25 degrees A device 159±16.4 μSv w-1 and D device 325±27.6. Except for 5 of the 24 conditions, all of them exceed the radiation control area. As a result of the study, it canbe seen that the annual dose limit is exceeded by converting the unit of the maximum value to 128.6±1.92mSv y-1. As the distance increases and the opening angle of the control room door decreases, the scatteringray, leakage ray decreases. Considering the probabilistic effects recommended in ICRP 103, it isjudged that continuous education for radiation workers is necessary.
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