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Fig. 3B —Mean absolute deviation in ranks. Predefined phantom constellations
for each four-quadrant phantom image (n = 65) calculated from
interpretations of individual quadrants are presented in box plots for
variables of number and size of microcalcifications, separated according to
six observers. Outliers are indicated by dots (
). Global analysis of
all 65 films showed that monitor reading produced more realistic estimation of
number, size, and shape of any microcalcifications present than when digital
film documentations or analog films were interpreted. Data for each display
medium are shown as follows: dark gray bars = analog films, striped bars =
digital films, and light gray bars = monitor-displayed images. Criterion is
size of detectable microcalcifications.
