Sabiniewicz-Ziajka Dominika, Szarmach Arkadiusz, Grzywińska Małgorzata, Gać Paweł, Piskunowicz Maciej
2nd Department of Radiology, Medical University of Gdansk, 80-210 Gdansk, Poland.
Neuroinformatics and Artificial Intelligence Laboratory, Department of Neurophysiology, Neuropsychology and Neuroinformatics, Medical University of Gdansk, 80-210 Gdansk, Poland.
Biomedicines. 2024 Mar 7;12(3):600. doi: 10.3390/biomedicines12030600.
Computed tomography (CT) contributes significantly to the collective dose from medical sources, raising concerns about potential health risks. However, existing radiation dose estimation tools, such as volume computed tomography dose index (CTDIvol), dose-length product (DLP), effective dose (ED), and size-specific dose estimate (SSDE), have limitations in accurately reflecting patient exposure. This study introduces a new parameter, size-specific dose-length product (DLPss), aiming to enhance the precision of radiation dose estimation in real-life scenarios.
A retrospective analysis of 134 chest CT studies was conducted. Relationships between CTDIvol and anthropometric parameters were examined, and SSDE was calculated based on effective diameter. Additionally, the novel parameter, DLPss, was introduced, considering scan length and cross-sectional dimensions.
Analysis reveals variations in scan length, effective diameter, and CTDIvol between genders. Strong correlations were observed between CTDIvol and effective diameter, particularly in men. The average CTDIvol for the entire group was 7.83 ± 2.92 mGy, with statistically significant differences between women (7.38 ± 3.23 mGy) and men (8.30 ± 2.49 mGy). SSDE values showed significant gender differences, with men exhibiting higher values. The average SSDE values for women and men were 9.15 ± 2.5 mGy and 9.6 ± 2.09 mGy, respectively, with a statistically significant difference ( = 0.03). The newly introduced DLPss values ranged around 343.90 ± 81.66 mGy·cm for the entire group, with statistically significant differences between women (323.53 ± 78.69 mGy·cm) and men (364.89 ± 79.87 mGy·cm) ( < 0.05), providing a comprehensive assessment of total radiation dose.
The study highlights the need for accurate radiation dose estimation, emphasizing the impact of CT examination parameters on dose variability. The proposed DLPss parameter offers a promising approach to enhancing precision in assessing radiation risk during CT scans. Further research is warranted to explore additional parameters for a comprehensive understanding of radiation exposure and to optimize imaging protocols for patient safety.
计算机断层扫描（CT）在医疗源集体剂量中占比显著，引发了对潜在健康风险的担忧。然而，现有的辐射剂量估算工具，如容积计算机断层扫描剂量指数（CTDIvol）、剂量长度乘积（DLP）、有效剂量（ED）和体型特异性剂量估算（SSDE），在准确反映患者受照剂量方面存在局限性。本研究引入了一个新参数——体型特异性剂量长度乘积（DLPss），旨在提高实际场景中辐射剂量估算的精度。
对134例胸部CT研究进行回顾性分析。研究了CTDIvol与人体测量参数之间的关系，并根据有效直径计算了SSDE。此外，引入了新参数DLPss，同时考虑了扫描长度和横截面尺寸。
分析显示，不同性别之间的扫描长度、有效直径和CTDIvol存在差异。观察到CTDIvol与有效直径之间存在强相关性，尤其是在男性中。整个组的平均CTDIvol为7.83±2.92 mGy，女性（7.38±3.23 mGy）和男性（8.30±2.49 mGy）之间存在统计学显著差异。SSDE值显示出显著的性别差异，男性的值更高。女性和男性的平均SSDE值分别为9.15±2.5 mGy和9.6±2.09 mGy，差异具有统计学意义（P = 0.03）。整个组新引入的DLPss值约为343.90±81.66 mGy·cm，女性（323.53±78.69 mGy·cm）和男性（364.89±79.87 mGy·cm）之间存在统计学显著差异（P < 0.05），提供了对总辐射剂量的全面评估。
该研究强调了准确进行辐射剂量估算的必要性，强调了CT检查参数对剂量变异性的影响。所提出的DLPss参数为提高CT扫描期间辐射风险评估的精度提供了一种有前景的方法。有必要进行进一步研究，探索更多参数以全面了解辐射暴露情况，并优化成像方案以保障患者安全。
