Waade Gunvor G, Sebuødegård Sofie, Hogg Peter, Hofvind Solveig
1 Faculty of Health Sciences, Oslo Metropolitan University , Oslo , Norway.
2 Department of Breast Screening, Cancer Registry of Norway , Oslo , Norway.
Br J Radiol. 2018 Oct;91(1090):20180209. doi: 10.1259/bjr.20180209. Epub 2018 Jul 13.
: Breast compression is used in mammography to improve image quality and reduce radiation dose. However, optimal values for compression force are not known, and studies have found large variation in use of compression forces between breast centres and radiographers. We investigated breast compression parameters, including compression force, compression pressure and compressed breast thickness across four consecutive full field digital mammography screening examinations for 25,143 subsequently screened females aged 50-69 years.
: Information from females attending four consecutive screening examinations at two breast centres in BreastScreen Norway during January 2007 - March 2016 was available. We compared the changes in compression force, compression pressure and compressed breast thickness from the first to fourth consecutive screening examination, stratified by craniocaudal (CC) and mediolateral oblique (MLO) view.
: Compression force, compression pressure and compressed breast thickness increased relatively by 18.3, 14.4 and 8.4% respectively, from first to fourth consecutive screening examination in CC view (p<0.001 for all). For MLO view, the values increased relatively by 12.3% for compression force, 9.9% for compression pressure and 6.9% for compressed breast thickness from first to fourth consecutive screening examination (p<0.001 for all).
: We observed increasing values of breast compression parameters across consecutive screening examinations. Further research should investigate the effect of this variation on image quality and females' experiences of discomfort and pain.
: Breast compression force, compression pressure and compressed breast thickness increased across consecutive screening examinations, which might be of influence for the females' experiences of discomfort and pain during the examination and for image quality.
乳腺压迫用于乳腺钼靶检查以提高图像质量并降低辐射剂量。然而，压迫力的最佳值尚不清楚，并且研究发现不同乳腺中心和放射技师之间在压迫力的使用上存在很大差异。我们调查了25143名年龄在50 - 69岁之间随后接受筛查的女性在连续四次全视野数字化乳腺钼靶筛查检查中的乳腺压迫参数，包括压迫力、压迫压力和压缩后乳腺厚度。
可获取来自挪威乳腺筛查项目中两个乳腺中心在2007年1月至2016年3月期间连续四次筛查检查的女性信息。我们比较了从第一次到第四次连续筛查检查中压迫力、压迫压力和压缩后乳腺厚度的变化，并按头尾位（CC）和内外斜位（MLO）视图分层。
在CC视图中，从第一次到第四次连续筛查检查，压迫力、压迫压力和压缩后乳腺厚度分别相对增加了18.3%、14.4%和8.4%（所有p值均<0.001）。在MLO视图中，从第一次到第四次连续筛查检查，压迫力相对增加了12.3%，压迫压力相对增加了9.9%，压缩后乳腺厚度相对增加了6.9%（所有p值均<0.001）。
我们观察到在连续的筛查检查中乳腺压迫参数值在增加。进一步的研究应调查这种变化对图像质量以及女性不适和疼痛体验的影响。
在连续的筛查检查中，乳腺压迫力、压迫压力和压缩后乳腺厚度增加，这可能会影响女性在检查期间的不适和疼痛体验以及图像质量。
