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

作　　者：薛珂 徐辉[1] 冯泽臣[2] 岳保荣[1] 丁艳秋[1] 叶兆祥 Xue Ke;Xu Hui;Feng Zechen;Yue Baorong;Ding Yanqiu;Ye Zhaoxiang(Key Laboratory of Radiological Protection and Nuclear Emergency,China CDC,National Institute for Radiological Protection,Chinese Center for Disease Control and Prevention,Beijing 100088,China;Institute of Radiological Protection,Bejing Center for Disease Prevention and Control,Beijing 100013,China;Department of Radiology,Tianjin Medical University Cancer Institute and Hospital,National Clinical Research Center of Cancer,Tianjin Key Laboratory of Cancer Prevention and Therapy,Tianjin's Clinical Research Center for Cancer,Key Laboratory of Breast Cancer Prevention and Therapy,Tianjin 300060,China)

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所、辐射防护与核应急中国疾病预防控制中心重点实验室,北京100088 [2]北京市疾病预防控制中心放射卫生防护所,北京100013 [3]天津医科大学肿瘤医院放射科、国家肿瘤临床医学研究中心、天津市肿瘤防治重点实验室、天津市恶性肿瘤临床医学研究中心、乳腺癌防治教育部重点实验室,天津300060

出　　处：《中华放射医学与防护杂志》2025年第2期122-128,共7页Chinese Journal of Radiological Medicine and Protection

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 cm^(3)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。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 cm^(3) 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.

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 

分 类 号：R144[医药卫生—公共卫生与预防医学]