National Coordinating Centre for the Physics in Mammography (NCCPM), Royal Surrey NHS Foundation Trust, 18 Frederick Sanger Road Surrey Research Park, Guildford, GU2 7YD, United Kingdom.
Br J Radiol. 2024 Mar 28;97(1156):787-793. doi: 10.1093/bjr/tqad039.
To report the latest UK mammography dose survey results and to compare radiation doses from digital breast tomosynthesis (DBT) and full-field digital mammography (FFDM) in UK breast screening.
Anonymized exposure factors were collected for 111 152 screening cases and 5113 assessment cases from 405 x-ray sets across the United Kingdom using an online submission system linked to a national database of mammography quality control data. Output and beam quality measurements from each set were combined with exposure data to estimate mean glandular doses (MGD).
FFDM doses increased by ∼10% compared to the 2016-2019 national survey but compressed breast thicknesses (CBT) remained similar. DBT doses were 34%-40% higher than FFDM overall and 34% higher than FFDM for breasts 50-60 mm thick. We found a possible overestimation of PMMA breast equivalent thicknesses at low CBTs, but the evidence was not conclusive.
Recent changes to the mix of x-ray models in use in UK breast screening have resulted in higher FFDM breast doses. DBT doses in the NHSBSP are on average higher than FFDM by ∼34%-40%.
This is the first national study to report DBT and FFDM MGDs in UK breast screening.
报告最新的英国乳腺摄影剂量调查结果，并比较英国乳腺筛查中数字乳腺断层合成（DBT）和全数字化乳腺摄影（FFDM）的辐射剂量。
使用与全国乳腺摄影质量控制数据数据库相关联的在线提交系统，从英国 405 个射线组中匿名收集了 111152 例筛查病例和 5113 例评估病例的暴露因素。每组的输出和束质测量值与暴露数据相结合，以估算平均腺体剂量（MGD）。
与 2016-2019 年全国调查相比，FFDM 剂量增加了约 10%，但压缩乳腺厚度（CBT）保持相似。DBT 总体剂量比 FFDM 高 34%-40%，50-60mm 厚的乳腺比 FFDM 高 34%。我们发现低 CBT 时 PMMA 乳腺当量厚度可能存在高估，但证据并不确凿。
英国乳腺筛查中使用的射线模型组合的最近变化导致 FFDM 乳房剂量增加。NHSBSP 中的 DBT 剂量平均比 FFDM 高约 34%-40%。
这是第一项报告英国乳腺筛查中 DBT 和 FFDM MGD 的全国性研究。
