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Fig. 3A —Bar graphs of number of correct positive findings (ordinate)
according to raters 1–4 and images in series A (analog film), B (digital
film), and C (digital monitor viewing) without scatter body made of ground
meat (abscissa). Black solid horizontal lines indicate respective number of
cubes with simulated masses. Each rater's stated degree of confidence is given
on 3-item ordinal scale: Finding is certainly present (black),
probably present (gray), or questionably present (white).
Raters 1–4 had 18, 4, 6, and 2 years of experience, respectively, with
analog mammography; raters 1–3 had 3 years of experience with digital
mammography and rater 4, 2 years. Category I (volume, 0.1–< 3.8
mm3, 139 cubes).
