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Clin Radiol. 2014 Apr;69(4):397-402. doi: 10.1016/j.crad.2013.11.010. Epub 2014 Jan 10.

Mammography test sets: reading location and prior images do not affect group performance.

Author information

  • 1Medical Image Optimisation and Perception Group (MIOPeG), Discipline of Medical Radiation Sciences, University of Sydney, Sydney, NSW, Australia; Department of Diagnostic Radiology, Singapore General Hospital, Singapore. Electronic address: bsoh6456@uni.sydney.edu.au.
  • 2Cancer Institute NSW, Alexandria, NSW, Australia.
  • 3Medical Image Optimisation and Perception Group (MIOPeG), Discipline of Medical Radiation Sciences, University of Sydney, Sydney, NSW, Australia.
  • 4Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA.



To examine how the location where reading takes place and the availability of prior images can affect performance in breast test-set reading.


Under optimized viewing conditions, 10 expert screen readers each interpreted a reader-specific set of images containing 200 mammographic cases. Readers, randomly divided into two groups read images under one of two pairs of conditions: clinical read with prior images and laboratory read with prior images; laboratory read with prior images and laboratory read without prior images. Region-of-interest (ROI) figure-of-merit (FOM) was analysed using JAFROC software. Breast side-specific sensitivity and specificity were tested using Wilcoxon matched-pairs signed rank tests. Agreement between pairs of readings was measured using Kendall's coefficient of concordance.


Group performances between test-set readings demonstrated similar ROI FOMs, sensitivity and specificity median values, and acceptable levels of agreement between pairs of readings were shown (W = 0.75-0.79, p < 0.001) for both pairs of reading conditions. On an individual reader level, two readers demonstrated significant decreases (p < 0.05) in ROI FOMs when prior images were unavailable. Reading location had an inconsistent impact on individual performance.


Reading location and availability of prior images did not significantly alter group performance.

Copyright © 2013 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved.

[PubMed - indexed for MEDLINE]
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