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| 1 | Estimated Average Glandular Dose for 1,828 Mammography Procedures in China: A Multicenter Study显示文摘Objective To understand the distribution of the average glandular dose(AGD) in mammography by investigating 1,828 exposure parameters of 8 mammography machines in three cities, by using random sampling. Methods A survey of 8 mammography machines in three different cities, sampled using stratified random sampling methods, was performed, and 1,828 mammography exposure parameters were recorded. Incident air kerma(k) was measured by Quality-Assurance(QA) dosimeters, and AGD was calculated by series conversion coefficients based on a 3D detailed Monte Carlo breast model, published by Wang et al. Results The distribution of compressed breast thickness(CBT) fitted a normal distribution, while that of AGD fitted a skewed distribution. The mean value of CBT in a medio-lateral oblique(MLO) view was about 5.6% higher than that in the craniocaudal(CC) view, with significant statistical difference; mean value of AGD and CBT in the sample was 1.3 mGy and 4.6 cm, respectively. The AGD trended upward with increasing CBT, similar to the results of other researches. Conclusion The mean AGD and CBT levels in our study for mammography practice in China were 1.3 mGy and 4.6 cm, respectively. AGD is influenced by manufacturer-specific variation as machine response to CBT changes and target/filter combination. The present study can provide evidence for establishing a diagnostic reference level in China. | DU Xiang WANG Jin ZHU Bao Li | 2019 | Biomedical and Environmental Sciences2019，32，4： | 2 |
| 2 | 江苏省乳腺X射线摄影频度调查及乳腺癌风险评估显示文摘目的调查估算江苏省乳腺X射线摄影的频度,进而估算乳腺摄影对江苏省女性人口的剂量负担,并评估乳腺摄影对江苏省各年龄组女性人口诱发乳腺癌的风险。方法采用分层随机抽样调查的方法,通过调查30台乳腺摄影设备年检查人数和受检者年龄分布,估算全省乳腺摄影的频度,并计算乳腺摄影对女性人口的剂量负担。使用美国科学院电离辐射生物效应报告BEIR-Ⅶ中的超额归因风险(EAR)模型估算乳腺摄影检查对3个年龄组诱发乳腺癌的风险。结果江苏省乳腺摄影检查的频度为3.77次/千人口;乳腺摄影对江苏省女性人口剂量负担为0.02 mGy/人。每次乳腺摄影检查对0~15岁组、16~40岁和>40岁3个年龄组的乳腺癌终生归因风险(LAR)分别为138/10万人、14.7/10万人和1.0/10万人。结论乳腺摄影对人群乳腺癌诱发风险较小,但低年龄组的风险较大,提示针对低年龄乳腺摄影检查仍应慎重。 | 杜翔 王进 | 2020 | 中华放射医学与防护杂志2020，40，6： | 1 |
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