Department of Anesthesiology and Pain Medicine, Konkuk University Medical Center, Seoul, Korea.
Korean J Pain. 2014 Apr;27(2):162-7. doi: 10.3344/kjp.2014.27.2.162. Epub 2014 Mar 28.
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.
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.
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).
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%.
虽然在 C 臂透视引导介入过程中，医生可能离射线源最近，但放射技师也靠近透视仪。我们前瞻性地研究了放射技师相对于其位置的辐射暴露。
使用数字剂量仪在放射技师的左胸和桌子侧面测量有效剂量（ED）。我们观察了每个程序中放射技师相对于透视仪移动支撑结构的位置（组 A、M 和 P）。收集了年龄、身高、体重、性别、曝光时间、辐射吸收剂量（RAD）以及放射技师胸部和桌子侧面的 ED 数据。
组 A 有 51 例，组 M 有 116 例，组 P 有 144 例。在年龄、身高、体重、男女比例和曝光时间、RAD 和桌子侧面 ED 等人口统计学数据方面，各组之间无显著差异。组 P 的 ED（所有组中最低的 0.5 ± 0.8 µSv）（组 A，1.6 ± 2.3 µSv；组 M，1.3 ± 1.9 µSv；P < 0.001）。组 A 的 ED 比值（放射技师胸部的 ED/桌子侧面的 ED）最高，组 P 的 ED 比值最低（组 A，12.2 ± 21.5%；组 M，5.7 ± 6.5%；组 P，2.5 ± 6.7%；P < 0.001）。
放射技师通过改变位置可以轻松减少辐射暴露。移动支撑结构后面的两步可以有效降低放射技师的暴露量约 80%。
