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The influence of increased ambient lighting on mass detection in mammograms.

Publication ,  Journal Article
Pollard, BJ; Samei, E; Chawla, AS; Baker, J; Ghate, S; Kim, C; Soo, MS; Hashimoto, N
Published in: Acad Radiol
March 2009

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.

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Published In

Acad Radiol

DOI

EISSN

1878-4046

Publication Date

March 2009

Volume

16

Issue

3

Start / End Page

299 / 304

Location

United States

Related Subject Headings

  • Visual Perception
  • Task Performance and Analysis
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Radiographic Image Interpretation, Computer-Assisted
  • Observer Variation
  • Nuclear Medicine & Medical Imaging
  • Mammography
  • Lighting
  • Humans
 

Citation

APA
Chicago
ICMJE
MLA
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Pollard, B. J., Samei, E., Chawla, A. S., Baker, J., Ghate, S., Kim, C., … Hashimoto, N. (2009). The influence of increased ambient lighting on mass detection in mammograms. Acad Radiol, 16(3), 299–304. https://doi.org/10.1016/j.acra.2008.08.017
Pollard, Benjamin J., Ehsan Samei, Amarpreet S. Chawla, Jay Baker, Sujata Ghate, Connie Kim, Mary S. Soo, and Noriyuki Hashimoto. “The influence of increased ambient lighting on mass detection in mammograms.Acad Radiol 16, no. 3 (March 2009): 299–304. https://doi.org/10.1016/j.acra.2008.08.017.
Pollard BJ, Samei E, Chawla AS, Baker J, Ghate S, Kim C, et al. The influence of increased ambient lighting on mass detection in mammograms. Acad Radiol. 2009 Mar;16(3):299–304.
Pollard, Benjamin J., et al. “The influence of increased ambient lighting on mass detection in mammograms.Acad Radiol, vol. 16, no. 3, Mar. 2009, pp. 299–304. Pubmed, doi:10.1016/j.acra.2008.08.017.
Pollard BJ, Samei E, Chawla AS, Baker J, Ghate S, Kim C, Soo MS, Hashimoto N. The influence of increased ambient lighting on mass detection in mammograms. Acad Radiol. 2009 Mar;16(3):299–304.
Journal cover image

Published In

Acad Radiol

DOI

EISSN

1878-4046

Publication Date

March 2009

Volume

16

Issue

3

Start / End Page

299 / 304

Location

United States

Related Subject Headings

  • Visual Perception
  • Task Performance and Analysis
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Radiographic Image Interpretation, Computer-Assisted
  • Observer Variation
  • Nuclear Medicine & Medical Imaging
  • Mammography
  • Lighting
  • Humans