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창용재,김아나,오인수,우남식,김해경,김재헌 대한통증학회 2014 The Korean Journal of Pain Vol.27 No.2
Background: Although a physician may be the nearest to the radiation source during C-arm fluoroscope-guided interventions, the radiographer is also near the fluoroscope. We prospectively investigated the radiation exposure of radiographers relative to their location. Methods: The effective dose (ED) was measured with a digital dosimeter on the radiographers’ left chest and the side of the table. We observed the location of the radiographers in each procedure related to the mobile support structure of the fluoroscope (Groups A, M and P). Data about age, height, weight, sex, exposure time, radiation absorbed dose (RAD), and the ED at the radiographer’s chest and the side of the table was collected. Results: There were 51 cases for Group A, 116 cases for Group M and 144 cases for Group P. No significant differences were noted in the demographic data such as age, height, weight, and male to female ratio, and exposure time, RAD and ED at the side of the table. Group P had the lowest ED (0.5 ± 0.8 μSv) of all the groups (Group A, 1.6 ± 2.3 μSv; Group M, 1.3 ± 1.9 μSv; P < 0.001). The ED ratio (ED on the radiographer’s chest/ED at the side of the table) of Group A was the highest, and the ED radio of Group P was the lowest of all the groups (Group A, 12.2 ± 21.5%; Group M, 5.7 ± 6.5%; Group P, 2.5 ± 6.7%; P < 0.001). Conclusions: Radiographers can easily reduce their radiation exposure by changing their position. Two steps behind the mobile support structure can effectively decrease the exposure of radiographers by about 80%.
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How Effective Are Radiation Reducing Gloves in C-arm Fluoroscopy-guided Pain Interventions?
김아나,창용재,천보경,김재헌 대한통증학회 2014 The Korean Journal of Pain Vol.27 No.2
Background: The physician’s hands are close to the X-ray field in C-arm fluoroscopy-guided pain interventions. We prospectively investigated the radiation attenuation of Proguard RR-2 gloves. Methods: In 100 cases, the effective doses (EDs) of two dosimeters without a radiation-reducing glove were collected. EDs from the two dosimeters−one dosimeter wrapped with a glove and the other dosimeter without a glove− were also measured at the side of the table (Group 1, 140 cases) and at a location 20 cm away from the side of the table (Group 2, 120 cases). Mean differences such as age, height, weight, radiation absorbed dose (RAD), exposure time, ED, and ratio of EDs were analyzed. Results: In the EDs of two dosimeters without gloves, there were no significant differences (39.0 ± 36.3 μSv vs. 38.8 ± 36.4 μSv) (P = 0.578). The RAD (192.0 ± 182.0 radcm2) in Group 2 was higher than that (132.3 ± 103.5 radcm2) in Group 1 (P = 0.002). The ED (33.3 ± 30.9 μSv) of the dosimeter without a glove in Group 1 was higher than that (12.3 ± 8.8 μSv) in Group 2 (P < 0.001). The ED (24.4 ± 22.4 μSv) of the dosimeter wrapped with a glove in Group 1 was higher than that (9.2 ± 6.8 μSv) in Group 2 (P < 0.001). No significant differences were noted in the ratio of EDs (73.5 ± 6.7% vs. 74.2 ± 9.3%, P = 0.469) between Group 1 and Group 2. Conclusions: Proguard RR-2 gloves have a radiation attenuation effect of 25.8−26.5%. The radiation attenuation is not significantly different by intensity of scatter radiation or the different RADs of C-arm fluoroscopy.
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