首页 | 本学科首页   官方微博 | 高级检索  
检索        


Importance of comparison of current and prior mammograms in breast cancer screening
Authors:Roelofs Antonius A J  Karssemeijer Nico  Wedekind Nora  Beck Christian  van Woudenberg Sander  Snoeren Peter R  Hendriks Jan H C L  Rosselli del Turco Marco  Bjurstam Nils  Junkermann Hans  Beijerinck David  Séradour Brigitte  Evertsz Carl J G
Institution:Department of Radiology, Radboud University Nijmegen Medical Center, Geert Grooteplein 10, 667 Radiology, 6500 HB Nijmegen, the Netherlands. T.Roelofs@rad.umcn.nl
Abstract:PURPOSE: To retrospectively determine the influence of comparing current mammograms with prior mammograms on breast cancer detection in screening and to investigate a protocol in which prior mammograms are viewed only when necessary. MATERIALS AND METHODS: Institutional review board approval was not required. Participants gave written informed consent. Twelve experienced screening radiologists read 160 soft-copy screening mammograms twice, once with and once without prior mammograms. Eighty mammograms were obtained in women in whom breast cancer was diagnosed later; the other 80 mammograms had been reported as normal or benign. All cancers were visible in retrospect. Readers located potential abnormalities, estimated likelihood of malignancy for each finding, and indicated whether prior mammograms were considered necessary. The effect of prior mammograms on detection was determined by computing the mean lesion localized fraction in a range of low fractions of nonlesion locations corresponding to operating points in screening. Scores for both reading sessions were combined to assess the effect of making prior mammograms available only when requested. Data were analyzed by comparing the number of localized lesions between the two reading conditions with a paired two-tailed Student t test and applying a linear mixed model to test differences in average mean lesion localized fraction between reading conditions. P values less than .05 indicated statistical significance. RESULTS: Without prior mammograms, significantly more annotations were made. When only positive cases were considered, no difference was observed. Reading performance was significantly better when prior screening mammograms were available. At fixed lesion localized fraction, nonlesion localized fraction was reduced by 44% (P<.001) on average when prior mammograms were read. Performance was also increased for combined reading mode (ie, when prior mammograms were available on request only). However, this increase was smaller than that when prior mammograms were always available. Prior mammograms were requested in 24%-33% of all cases and were requested more often in positive cases. CONCLUSION: Comparison with prior mammograms significantly improves overall performance and can reduce referrals due to nonlesion locations. Limiting the availability of prior mammograms to cases selected by the reader reduces the beneficial effect of prior mammograms.
Keywords:
本文献已被 PubMed 等数据库收录!
点击此处可从《Radiology》浏览原始摘要信息
点击此处可从《Radiology》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号