| 薛珂,徐辉,冯泽臣,等.基于仿真乳房模体的乳腺锥形束CT受检者辐射剂量测量[J].中华放射医学与防护杂志,2025,45(2):122-128.Xue Ke,Xu Hui,Feng Zechen,et al.Radiation dose measurement for breast cone-beam CT-scanned examinees based on ART phantom of breast[J].Chin J Radiol Med Prot,2025,45(2):122-128 |
| 基于仿真乳房模体的乳腺锥形束CT受检者辐射剂量测量 |
| Radiation dose measurement for breast cone-beam CT-scanned examinees based on ART phantom of breast |
| 投稿时间：2024-02-05 |
| DOI：10.3760/cma.j.cn112271-20240205-00044 |
| 中文关键词: 乳腺锥形束CT 热释光探测器 乳腺平均剂量 辐射剂量 |
| 英文关键词:Breast cone-beam computed tomography Thermoluminescent detector Average glandular dose Radiation dose |
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| 中文摘要: |
| 目的 评估乳腺锥形束CT(CBCT)受检者辐射剂量, 为临床上乳腺X射线摄影设备的选择提供剂量参考。方法 本研究基于400 cm3仿真乳房模体和热释光探测器(TLD), 测量并计算了乳腺CBCT设备在管电流50、100 mA两种扫描条件下对受检乳房所造成的乳腺吸收剂量的分布情况, 并进一步计算乳腺平均剂量(AGD)。结果 在50和100 mA管电流下, 经模体测得受检乳房内部的乳腺吸收剂量范围分别为2.25 ~ 7.97 mGy和3.88 ~ 15.68 mGy, 乳腺吸收剂量呈现从模体四周到中心递减趋势;对应的两种管电流下的AGD分别为4.87和9.81 mGy。结论 本研究中乳腺CBCT受检者AGD高于目前临床常用的数字乳腺X射线摄影受检者典型剂量, 可为今后临床上乳腺影像学方法的合理选择提供剂量参考。 |
| 英文摘要: |
| Objective To measure and estimate the radiation dose to breast cone-beam CT (CBCT) -scanned examinees, which can provide a dose reference for the selection of mammography equipment in the clinic. Methods In this study, using a 400 cm3 Alderson radiation therapy (ART) breast phantom and thermoluminescent detectors (TLDs), the distribution of absorbed dose, and the average glandular dose (AGD), to the examined breasts caused by a breast CBCT scanner was measured and calculated scanner at 50 and 100 mA tube currents. Results At 50 and 100 mA tube currents, the range of breast absorbed dose inside the examined breast measured based on the phantom was 2.25-7.97 mGy and 3.88-15.68 mGy, respectively, with breast absorbed dose decreasing from the periphery to the centre of the phantom, and the related AGDs were 4.87 and 9.81 mGy, respectively. Conclusions The AGDs to the breast of CBCT-scanned examinees measured in this study was higher than in the case of commonly used digital mammography. This will be meaningful to provide the guidance on the rational choice of imaging equipment in future clinical practice. |
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