Department of Interventional Radiology, The First Affiliated Hospital of Soochow University, No. 188 Shizi Road, Suzhou 215006, China.
State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China.
Tomography. 2024 Feb 26;10(3):320-330. doi: 10.3390/tomography10030025.
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⋅cm for head CBCT and 47.4 (39.6-54.3) Gy⋅cm 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.
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。虽然 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，但它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中进行头和腹部 CBCT 扫描的患者的辐射暴露及其影响因素。这项回顾性研究共纳入了 752 名患者。剂量面积乘积（DAP）和参考空气比释动能（RAK）被用作患者剂量的度量。结果表明，头 CBCT 的 DAP 中位数为 53.8（50.5-64.4）Gy⋅cm，腹部的 DAP 中位数为 47.4（39.6-54.3）Gy⋅cm。男性和身体质量指数（BMI）在头和腹部 CBCT 扫描中均表现出 DAP 和 RAK 值的增加。较大的 FOV 大小与更高的 DAP 相关，但与更低的 RAK 值相关，特别是在头 CBCT 扫描中。自动曝光控制（AEC）下的曝光参数也根据患者的 BMI 和性别而有所不同。总之，与腹部 CBCT 扫描相比，头 CBCT 扫描使患者接受的辐射剂量略高。BMI、性别和 FOV 大小是影响 CBCT 扫描中患者辐射剂量的关键因素。我们的结果可能有助于确定和最小化患者的辐射暴露。
