Loveland John, Mackenzie Alistair
National Co-ordinating Centre for the Physics of Mammography (NCCPM), Medical Physics Department, Royal Surrey NHS Foundation Trust, Guildford GU2 7XX UK.
National Co-ordinating Centre for the Physics of Mammography (NCCPM), Medical Physics Department, Royal Surrey NHS Foundation Trust, Guildford GU2 7XX UK.
Phys Med. 2025 Feb;130:104908. doi: 10.1016/j.ejmp.2025.104908. Epub 2025 Jan 21.
The American Association of Physicists in Medicine (AAPM) Task group 282 (TG282) in collaboration with the European Federation for Organisations of Medical Physics (EFOMP) have developed a novel breast dosimetry model intended as a single international standard.
To explore the impact of TG282 dosimetry on estimates of average Mean Glandular Dose (MGD) in the United Kingdom (UK) National Health Service (NHS) Breast Screening Programmes (BSP).
MGDs were estimated, using the TG282 dosimetry model, for the most recent UK NHSBSP dose survey. This dataset included MGDs estimated using the Dance dosimetry model for 439,916 Full Field Digital Mammography (FFDM) exposures of 111,132 women and 10,831 Digital Breast Tomosynthesis (DBT) exposures of 5,113 women. Direct comparisons of the two models were made and differences explored using this large-scale real world dataset.
TG282 model MGDs were on average approximately 20 % and 15 % lower than Dance model values for FFDM and DBT respectively. For the UK National Diagnostic Reference Level (NDRL) breast thickness range of 50 mm to 60 mm inclusive differences were smaller at approximately 13 % and 10 % respectively. The difference between dosimetry models was shown to depend on the properties of the imaged population and X-ray equipment used. Average differences of up to 63.1 % were observed at higher CBT values for FFDM.
On average, the TG282 dosimetry model resulted in lower estimates for MGD in UK mammography. The differences were more pronounced for women with larger than average compressed breast thickness.
美国医学物理学家协会（AAPM）任务组282（TG282）与欧洲医学物理组织联合会（EFOMP）合作开发了一种新型乳腺剂量测定模型，旨在作为单一的国际标准。
探讨TG282剂量测定法对英国国家医疗服务体系（NHS）乳腺筛查计划（BSP）中平均腺体剂量（MGD）估计值的影响。
使用TG282剂量测定模型对英国NHSBSP最新剂量调查中的MGD进行估计。该数据集包括使用Dance剂量测定模型对111,132名女性的439,916次全视野数字乳腺摄影（FFDM）曝光以及5,113名女性的10,831次数字乳腺断层合成（DBT）曝光估计的MGD。使用这个大规模的真实世界数据集对两种模型进行直接比较，并探讨差异。
TG282模型的MGD平均分别比FFDM和DBT的Dance模型值低约20%和15%。对于英国国家诊断参考水平（NDRL）中50毫米至60毫米（含）的乳腺厚度范围，差异较小，分别约为13%和10%。结果表明，剂量测定模型之间的差异取决于成像人群的特征和所使用的X射线设备。在FFDM的较高CBT值下，观察到平均差异高达63.1%。
平均而言，TG282剂量测定模型导致英国乳腺摄影中MGD的估计值较低。对于乳腺压缩厚度大于平均水平的女性，差异更为明显。
