Otomo Kazuki, Inaba Yohei, Abe Keisuke, Onodera Mana, Suzuki Tomohiro, Sota Masahiro, Haga Yoshihiro, Suzuki Masatoshi, Zuguchi Masayuki, Chida Koichi
Course of Radiological Technology, Health Sciences, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan.
Department of Radiology, Tohoku University Hospital, 1-1 Seiryo, Aoba-ku, Sendai 980-8574, Japan.
Bioengineering (Basel). 2023 Feb 16;10(2):259. doi: 10.3390/bioengineering10020259.
Mobile radiography allows for the diagnostic imaging of patients who cannot move to the X-ray examination room. Therefore, mobile X-ray equipment is useful for patients who have difficulty with movement. However, staff are exposed to scattered radiation from the patient, and they can receive potentially harmful radiation doses during radiography. We estimated occupational exposure during mobile radiography using phantom measurements. Scattered radiation distribution during mobile radiography was investigated using a radiation survey meter. The efficacy of radiation-reducing methods for mobile radiography was also evaluated. The dose decreased as the distance from the X-ray center increased. When the distance was more than 150 cm, the dose decreased to less than 1 μSv. It is extremely important for radiological technologists (RTs) to maintain a sufficient distance from the patient to reduce radiation exposure. The spatial dose at eye-lens height increases when the bed height is high, and when the RT is short in stature and abdominal imaging is performed. Maintaining sufficient distance from the patient is also particularly effective in limiting radiation exposure of the eye lens. Our results suggest that the doses of radiation received by staff during mobile radiography are not significant when appropriate radiation protection is used. To reduce exposure, it is important to maintain a sufficient distance from the patient. Therefore, RTs should bear this is mind during mobile radiography.
移动放射成像可对无法移动至X射线检查室的患者进行诊断成像。因此，移动X射线设备对行动不便的患者很有用。然而，工作人员会受到来自患者的散射辐射，在放射成像过程中他们可能会受到潜在有害的辐射剂量。我们使用体模测量估计了移动放射成像期间的职业暴露。使用辐射测量仪研究了移动放射成像期间的散射辐射分布。还评估了移动放射成像的辐射减少方法的效果。剂量随着与X射线中心距离的增加而降低。当距离超过150厘米时，剂量降至1微希沃特以下。放射技师与患者保持足够的距离以减少辐射暴露极为重要。当床的高度较高、放射技师身材较矮且进行腹部成像时，眼晶状体高度处的空间剂量会增加。与患者保持足够的距离对于限制眼晶状体的辐射暴露也特别有效。我们的结果表明，当采用适当的辐射防护措施时，工作人员在移动放射成像期间所接受的辐射剂量并不显著。为了减少暴露，与患者保持足够的距离很重要。因此，放射技师在移动放射成像期间应牢记这一点。
