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Every second counts: digital and analogue mammography - comparison of reading times at the Queen Elizabeth Breast Screening Unit, Gateshead, UK
© Bristow et al. 2011
- Published: 4 November 2011
- Screening Programme
- Digital Mammography
- Breast Screening
- Previous Image
- Digital Mammogram
In the NHS Breast Screening Programme (NHSBSP) there is a transition to digital mammography following recommendations made by the Cancer Reform Strategy . A number of US studies have demonstrated that the time taken to interpret digital mammography is longer than that for analogue [2, 3]. There are no published data about this from the NHSBSP.
Over a 2-month period, 11 readers were timed in their interpretation of batched analogue or digital mammograms. These were either hung on a multiviewer or preloaded onto Sectra PACS. Previous images were not digitised. A total of 396 batches were included in the analysis (unpaired t test), 330 digital and 66 analogue.
It takes more time to report a digital mammogram compared with analogue (40 ± 1 vs. 35 ± 2 seconds, P < 0.05). There is no difference in the time taken to report prevalent screens between the analogue and digital groups (34 ± 7 vs. 39 ± 2 seconds). The incident screens were quicker to interpret as analogue.
Our data support the hypothesis that digital interpretation is slower than analogue (albeit by 5 seconds) but in the absence of needing to compare with previous images there is no difference between the two modalities.
- Cancer Reform Strategy. 2007, Department of HealthGoogle Scholar
- Berns EA, Edward Hendrik R, Solari M, et al: Digital and screen-film mammography: comparison of image acquisition and interpretation times. Am J Roentgenol. 2006, 187: 38-41. 10.2214/AJR.05.1397.View ArticleGoogle Scholar
- Haygood TM, et al: Timed efficiency of interpretation of digital and film-screen screening mammograms. Am J Roentgenol. 2009, 192: 216-220. 10.2214/AJR.07.3608.View ArticleGoogle Scholar
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