The influence of increased ambient lighting on mass detection in mammograms.
Rationale and Objectives: Recent research has provided evidence that in reading rooms equipped with liquid crystal displays (LCDs), a measured increase of ambient lighting may improve clinicians' detection performance. In agreement with this research, the American College of Radiology (ACR) has reco...
| Published in: | Academic Radiology Vol. 16; no. 3; pp. 299 - 305 |
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| Main Authors: | , , , , , , , , , , , , , , , |
| Format: | research Journal Article |
| Published: |
Elsevier B.V.
Mar2009
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105445947&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105445947 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10766332 T4X jtl: Academic Radiology issn: 10766332 maglogo: N pubinfo: dt: Mar2009 vid: 16 iid: 3 pid: 467 pub: Elsevier B.V. place: New York, New York artinfo: ui: 105445947 105445947 NLM19201358 2010186871 10.1016/j.acra.2008.08.017 NLM19201358 105445947 ppf: 299 ppct: 6 formats: tig: atl: The influence of increased ambient lighting on mass detection in mammograms. aug: au: Pollard BJ Samei E Chawla AS Baker J Ghate S Kim C Soo MS Hashimoto N Pollard, Benjamin J Samei, Ehsan Chawla, Amarpreet S Baker, Jay Ghate, Sujata Kim, Connie Soo, Mary S Hashimoto, Noriyuki affil: Duke Advanced Imaging Laboratories, Department of , Duke University, Durham, NC, USA sug: subj: Breast Neoplasms Radiography Computer Terminals Lighting Methods Mammography Methods Radiographic Image Interpretation, Computer-Assisted Methods Task Performance and Analysis Visual Perception Artifacts Environment Female Observer Bias Reproducibility of Results Sensitivity and Specificity Human Female ab: Rationale and Objectives: Recent research has provided evidence that in reading rooms equipped with liquid crystal displays (LCDs), a measured increase of ambient lighting may improve clinicians' detection performance. In agreement with this research, the American College of Radiology (ACR) has recommended a moderate increase of ambient lighting in mammography reading rooms. This study was designed to examine the effect of a controlled increase of ambient lighting in mammography reading rooms on the diagnostic performance of breast imaging radiologists. Materials and Methods: Four breast imaging radiologists read 86 mammograms (43 containing subtle cancerous masses and 43 normal) under low (E = 1 lux) and elevated (E = 50 lux) ambient lighting levels on a Digital Imaging and Communications in Medicine-calibrated, medical-grade LCD. Radiologists were asked to identify cancerous masses and to rate their detection confidence. Observer areas under the curve (AUCs) were calculated using a receiver-operating characteristic analysis of fully paired results. Additionally, average observer selection times under both ambient lighting levels were determined. Results: Average radiologist AUCs decreased with elevated ambient lighting (0.78 +/- 0.03 to 0.72 +/- 0.04). Observer performance differences, however, were of the same order of magnitude as interobserver variability and were not statistically significant. Average selection times under increased ambient lighting remained constant or decreased, with the greatest decrease occurring for false-positive (20.4 +/- 18.9 to 14.4 +/- 9.6 seconds) and true-positive (18.0 +/- 13.8 to 12.9 +/- 9.4 seconds) selections. Conclusion: The results agree with those of previous studies in that observer performance differences under a controlled increase of ambient lighting are not statistically significant. On the basis of these findings and ACR guidelines, a moderate increase of ambient lighting in mammography reading rooms is still suggested, but further research with additional cases and observers should be considered. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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