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Blurred digital mammography images: an analysis of technical recall and observer detection performance

2017-03Journal article Restricted access
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dc.contributor.authorMa, Wang Kei
dc.contributor.authorBorgen, Rita
dc.contributor.authorKelly, Judith
dc.contributor.authorMillington, Sara
dc.contributor.authorHilton, Beverley
dc.contributor.authorAspin, Rob
dc.contributor.authorLança, Carla
dc.contributor.authorHogg, Peter
dc.date.accessioned2017-08-21T10:41:26Z
dc.date.available2017-08-21T10:41:26Z
dc.date.issued2017-03
dc.description.abstractObjective - Blurred images in full-field digital mammography are a problem in the UK Breast Screening Programme. Technical recalls may be due to blurring not being seen on lower resolution monitors used for review. This study assesses the visual detection of blurring on a 2.3-MP monitor and a 5-MP report grade monitor and proposes an observer standard for the visual detection of blurring on a 5-MP reporting grade monitor. Methods - 28 observers assessed 120 images for blurring; 20 images had no blurring present, whereas 100 images had blurring imposed through mathematical simulation at 0.2, 0.4, 0.6, 0.8 and 1.0 mm levels of motion. Technical recall rate for both monitors and angular size at each level of motion were calculated. χ2 tests were used to test whether significant differences in blurring detection existed between 2.3- and 5-MP monitors. Results - The technical recall rate for 2.3- and 5-MP monitors are 20.3% and 9.1%, respectively. The angular size for 0.2- to 1-mm motion varied from 55 to 275 arc s. The minimum amount of motion for visual detection of blurring in this study is 0.4 mm. For 0.2-mm simulated motion, there was no significant difference [χ2 (1, N = 1095) = 1.61, p = 0.20] in blurring detection between the 2.3- and 5-MP monitors. Conclusion - According to this study, monitors ≤2.3 MP are not suitable for technical review of full-field digital mammography images for the detection of blur.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMa WK, Borgen R, Kelly J, Millington S, Hilton B, Lança C, et al. Blurred digital mammography images: an analysis of technical recall and observer detection performance. Br J Radiol. 2017;90(1071):ID20160271.pt_PT
dc.identifier.doi10.1259/bjr.20160271pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.21/7331
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherBritish Institute of Radiologypt_PT
dc.relation.publisherversionhttp://www.birpublications.org/doi/abs/10.1259/bjr.20160271pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectBreastpt_PT
dc.subjectBreast neoplasmspt_PT
dc.subjectFemalept_PT
dc.subjectHumanspt_PT
dc.subjectMammographypt_PT
dc.subjectObserver variationpt_PT
dc.subjectReproducibility of resultspt_PT
dc.subjectUnited Kingdompt_PT
dc.titleBlurred digital mammography images: an analysis of technical recall and observer detection performancept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue1071pt_PT
oaire.citation.startPage20160271pt_PT
oaire.citation.titleBritish Journal of Radiologypt_PT
oaire.citation.volume90pt_PT
person.familyNameLança
person.givenNameCarla
person.identifier.ciencia-id601A-6412-BF2F
person.identifier.orcid0000-0001-9918-787X
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication0320b455-ee19-4670-8bf2-10dce9de1bec
relation.isAuthorOfPublication.latestForDiscovery0320b455-ee19-4670-8bf2-10dce9de1bec

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