Inaba Yohei, Hitachi Shin, Watanuki Munenori, Chida Koichi
Course of Radiological Technology, Health Sciences, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Aoba, Sendai, Miyagi 980-8575, Japan.
Department of Radiation Disaster Medicine, International Research Institute of Disaster Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba, Sendai, Miyagi 980-0845, Japan.
Diagnostics (Basel). 2021 Apr 2;11(4):646. doi: 10.3390/diagnostics11040646.
In computed tomography (CT)-guided interventions (CTIs), physicians are close to a source of scattered radiation. The physician and staff are at high risk of radiation-induced injury (cataracts). Thus, dose-reducing measures for physicians are important. However, few previous reports have examined radiation doses to physicians in CTIs. This study evaluated the radiation dose to the physician and medical staff using multi detector (MD)CT-fluoroscopy, and attempted to understand radiation-protection and -reduction methods. The procedures were performed using an interventional radiology (IVR)-CT system. We measured the occupational radiation dose (physician and nurse) using a personal dosimeter in real-time, gathered CT-related parameters (fluoroscopy time, mAs, CT dose index (CTDI), and dose length product (DLP)), and performed consecutive 232 procedures in CT-guided biopsy. Physician doses (eye lens, neck, and hand; μSv, average ± SD) in our CTIs were 39.1 ± 36.3, 23.1 ± 23.7, and 28.6 ± 31.0, respectively. Nurse doses (neck and chest) were lower (2.3 ± 5.0 and 2.4 ± 4.4, respectively) than the physician doses. There were significant correlations between the physician doses (eye and neck) and related factors, such as CT-fluoroscopy mAs (eye dose: r = 0.90 and neck dose: r = 0.83). We need to understand the importance of reducing/optimizing the dose to the physician and medical staff in CTIs. Our study suggests that physician and staff doses were not significant when the procedures were performed with the appropriate radiation protection and low-dose techniques.
在计算机断层扫描（CT）引导下的介入操作（CTIs）中，医生靠近散射辐射源。医生和工作人员面临辐射诱发损伤（白内障）的高风险。因此，针对医生的剂量降低措施很重要。然而，以前很少有报告研究CTIs中医生所受的辐射剂量。本研究使用多探测器（MD）CT透视评估了医生和医护人员所受的辐射剂量，并试图了解辐射防护和剂量降低方法。操作使用介入放射学（IVR）-CT系统进行。我们使用个人剂量计实时测量职业辐射剂量（医生和护士），收集CT相关参数（透视时间、毫安秒、CT剂量指数（CTDI）和剂量长度乘积（DLP）），并在CT引导下活检中连续进行了232例操作。在我们的CTIs中，医生的剂量（晶状体、颈部和手部；微西弗，平均值±标准差）分别为39.1±36.3、23.1±23.7和28.6±31.0。护士的剂量（颈部和胸部）低于医生的剂量（分别为2.3±5. and 2.4±4.4）。医生的剂量（眼部和颈部）与相关因素之间存在显著相关性，如CT透视毫安秒（眼部剂量：r = 0.90，颈部剂量：r = 0.83）。我们需要了解在CTIs中降低/优化医生和医护人员剂量的重要性。我们的研究表明，当采用适当的辐射防护和低剂量技术进行操作时，医生和工作人员的剂量并不显著。
