Department of Medical Physics, Faculty of Medicine, University of Crete, Heraklion, Crete, Greece.
Osteoporos Int. 2013 Jul;24(7):2025-31. doi: 10.1007/s00198-012-2261-x. Epub 2013 Jan 10.
Effective radiation doses associated with bone mineral density examinations performed on children using a GE Lunar Prodigy fan-beam dual-energy X-ray absorptiometry (DXA) scanner were found to be comparable to doses from pencil-beam DXA devices, i.e., lower than 1 μSv. Cancer risks associated with acquisitions obtained in this study are negligible.
No data were found in the literature on radiation doses and potential risks following pediatric DXA performed on GE Lunar DXA scanners. This study aimed to estimate effective doses and associated cancer risks involved in pediatric examinations performed on a GE Lunar Prodigy scanner.
Four physical anthropomorphic phantoms representing newborn, 1-, 5-, and 10-year-old patients were employed to simulate DXA exposures. All acquisitions were carried out using the Prodigy scanner. Dose measurements were performed for spine and dual femur using the phantoms simulating the 5- and 10-year-old child. Moreover, doses associated with whole-body examinations were measured for the four phantoms used in the current study.
The gender-average effective dose for spine and hip examinations were 0.65 and 0.36 μSv, respectively, for the phantom representing the 5-year-old child and 0.93 and 0.205 μSv, respectively, for the phantom representing the 10-year-old child. Effective doses for whole-body examinations were 0.25, 0.22, 0.19, and 0.15 μSv for the neonate, 1-, 5-, and 10-year old child, respectively. The estimated lifetime cancer risks were negligible, i.e., 0.02-0.25 per million, depending on the sex, age, and type of DXA examination. A formula is presented for the estimation of effective dose from examinations performed on GE Lunar Prodigy scanners installed in other institutions.
The effective doses and potential cancer risks associated with pediatric DXA examinations performed on a GE Lunar Prodigy fan-beam scanner were found to be comparable to doses and risks reported from pencil-beam DXA devices.
本研究旨在估算在 GE Lunar Prodigy 扫描仪上进行儿科双能 X 射线吸收法（DXA）检查的有效剂量和相关癌症风险。
使用代表新生儿、1 岁、5 岁和 10 岁患者的四个物理人体模型来模拟 DXA 暴露。所有采集均使用 Prodigy 扫描仪进行。使用模拟 5 岁和 10 岁儿童的模型对脊柱和双股骨进行剂量测量。此外，还对当前研究中使用的四个模型进行了全身检查的相关剂量测量。
代表 5 岁儿童的模型的脊柱和髋关节检查的性别平均有效剂量分别为 0.65 和 0.36 μSv，代表 10 岁儿童的模型分别为 0.93 和 0.205 μSv。新生儿、1 岁、5 岁和 10 岁儿童的全身检查有效剂量分别为 0.25、0.22、0.19 和 0.15 μSv。估计的终生癌症风险可以忽略不计，即每百万例中为 0.02-0.25 例，具体取决于性别、年龄和 DXA 检查类型。本文还提出了一种用于估算在其他机构安装的 GE Lunar Prodigy 扇束扫描仪上进行的检查的有效剂量的公式。
在 GE Lunar Prodigy 扇束扫描仪上进行儿科 DXA 检查的有效剂量和潜在癌症风险与笔束 DXA 设备报告的剂量和风险相当。
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