Surveillance results. (a) Boxplot shows surveillance
interval data from the 163 patients who underwent at least one
surveillance gadoxetate-enhanced abbreviated MRI (AMRI) after the
baseline examination. The box plots show the median (solid horizontal
bar), second and third quartile (solid box), and standard deviation
(error bars) of the follow-up intervals between examinations for a given
round of surveillance. The width of the plot is proportional to the
number of studies in a given group, which is also listed at the bottom
of the graph. Light gray represents the total interval from baseline
examination, and dark gray represents the mean interval from the prior
examination. (b) Graphic representation of the rate of
positive examinations (black circles) or positive-plus-subthreshold
examinations (gray squares) during a given round of gadoxetate-enhanced
abbreviated MRI surveillance. The y-axis represents the percentage of
studies in a group that were positive ± subthreshold. The x-axis
represents the mean number of months between the first (baseline)
examination and each subsequent round of surveillance. The number of
studies in a given group is listed along the lower portion of the graph.
There were 330 patients in the cohort who underwent a baseline (first)
gadoxetate-enhanced abbreviated MRI examination, 163 who underwent a
second examination, and so on. Error bars = lower and upper bounds
of the 95% confidence interval.