PDF(Pubmed)
Abstract：
Cone-beam computed tomography (CBCT) is a widely used imaging technique in interventional radiology. Although CBCT offers great advantages in terms of improving comprehension of complex angioarchitectures and guiding therapeutic decisions, its additional degree of radiation exposure has also aroused considerable concern. In this study, we aimed to assess radiation exposure and its influential factors in patients undergoing CBCT scans of the head and abdomen during interventional procedures. A total of 752 patients were included in this retrospective study. Dose area product (DAP) and reference air kerma (RAK) were used as measures of patient dose. The results showed that the median values of DAP were 53.8 (50.5-64.4) Gy⋅cm2 for head CBCT and 47.4 (39.6-54.3) Gy⋅cm2 for that of the abdomen. Male gender and body mass index (BMI) were characterized by increased DAP and RAK values in both head and abdominal CBCT scans. Larger FOV size was associated with a higher DAP but a lower RAK value, especially in head CBCT scans. Exposure parameters under automatic exposure control (AEC) also varied according to patient BMI and gender. In conclusion, the patients received slightly higher radiation doses from head CBCT scans than from those applied to the abdomen. BMI, gender, and FOV size were the key factors that influenced the radiation dose administered to the patients during CBCT scans. Our results may help to define and minimize patients\' exposure to radiation.
摘要：
锥形束计算机断层扫描（CBCT）是介入放射学中广泛使用的成像技术。尽管CBCT在提高对复杂血管结构的理解和指导治疗决策方面具有很大的优势，其额外的辐射暴露程度也引起了相当大的关注。在这项研究中,我们旨在评估在介入手术期间接受头腹部CBCT扫描的患者的辐射暴露及其影响因素.本回顾性研究共纳入752例患者。使用剂量面积乘积(DAP)和参考空气角化(RAK)作为患者剂量的量度。结果表明，头部CBCT的DAP中值为53.8（50.5-64.4）Gy·cm2，腹部为47.4（39.6-54.3）Gy·cm2。男性性别和体重指数（BMI）的特征是头部和腹部CBCT扫描中DAP和RAK值增加。较大的FOV大小与较高的DAP但较低的RAK值相关，尤其是在头部CBCT扫描中。自动暴露控制（AEC）下的暴露参数也根据患者BMI和性别而变化。总之,患者接受头部CBCT扫描的辐射剂量略高于腹部.BMI,性别,和FOV大小是影响CBCT扫描期间患者辐射剂量的关键因素。我们的结果可能有助于确定和减少患者的辐射暴露。
