Laboratory of Materials and Subatomic Physics, Faculty of Sciences, Department of Physics, Ibn Tofail University, Kenitra, Morocco.
Higher Institute of Nursing Professions and Health Techniques, Agadir, Morocco.
J Digit Imaging. 2022 Dec;35(6):1648-1653. doi: 10.1007/s10278-022-00657-0. Epub 2022 May 24.
Size-specific dose estimates (SSDE) are the latest topic of interest in patient radiation-dose studies in computed tomography (CT). The aim of this study is to calculate and evaluate the doses (SSDE) by measuring the effective diameter (ED) of cross-sectional images collected during CT examinations of the chest and abdomen in Moroccan hospitals. Doses (SSDE) were calculated based on cross-sectional images by measuring the effective diameters of 75 patients in both examinations (45 for the thorax and 30 for the abdomen). Specific conversion factors for (ED) were used to convert the registered CTDI to SSDE, according to the instruction in the American Association of Physicists (AAPM) Report 204. In thoracic CT, the CTDI and SSDE values ranged from 5.8 to 10.7 mGy (mean: 8.08) and 9.55 to 15.37 mGy (mean: 12.13), respectively. For abdominal CT, CTDI and SSDE values ranged from 4.8 to 12.2 mGy (mean: 7.95) and 8.01 to 14.15 mGy (mean: 11.31), respectively. The results show that the SSDE is a useful tool and could potentially educate CT operators on its effective use as a way to optimize radiation dose instead of CTDI, in particular to establish diagnostic reference levels.
在计算机断层扫描（CT）的患者辐射剂量研究中，基于体素的剂量估计（SSDE）是最新的研究课题。本研究旨在通过测量摩洛哥医院胸部和腹部 CT 检查的横截面上的有效直径（ED），计算并评估剂量（SSDE）。通过测量 75 名患者在这两种检查中的有效直径（胸部 45 名，腹部 30 名），基于横截面上的剂量（SSDE）进行计算。根据美国物理学家协会（AAPM）报告 204 中的说明，使用特定的（ED）转换因子将注册的 CTDI 转换为 SSDE。在胸部 CT 中，CTDI 和 SSDE 值的范围分别为 5.8 至 10.7 mGy（平均值：8.08）和 9.55 至 15.37 mGy（平均值：12.13）。对于腹部 CT，CTDI 和 SSDE 值的范围分别为 4.8 至 12.2 mGy（平均值：7.95）和 8.01 至 14.15 mGy（平均值：11.31）。结果表明，SSDE 是一种有用的工具，它可以作为一种优化辐射剂量的有效方法，而不是 CTDI，特别是为了建立诊断参考水平，来教育 CT 操作人员。
