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FIG 2. RSI indices (mean ± 1 standard error) for recurrent IP (open bullets), postoperative changes (solid bullets), and mouth-floor muscle (inverted pyramid) are shown. Note the differences in the magnitude and time course of enhancement. Both types of lesions enhance to a similar final magnitude, but there are marked differences in relative enhancement immediately after contrast injection (P < .01 by Student's t test or Wilcoxon rank sums test)
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