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Figure 6 Distribution of 18
F-fluorodeoxyglucose (FDG) uptake in patients grouped by average plaque inflammation. Patients were grouped according to the average amount of inflammation in their carotid specimens and the average FDG uptake determined for each group. The ranges assigned to these groups reflect the levels of inflammation shown to be important in previous histologic studies (14,20,21
). The box plot shows mean values (thick lines)
and 25th and 75 percentile values (upper and lower box boundaries)
. The length of the whiskers
from the box boundaries represents standard error of the mean. The mean FDG uptake value for each group was significantly different. T/B = target-to-background ratio.
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