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FIGURE 6. ROC curves for detection of recurrent CRC on a region basis for in-line PET/CT and software fusion of PET and CT. Analysis included 67 regions in the subgroup of 26 patients with successful fusion of PET and CT. According to the reference standard, recurrent CRC was present in 14 regions. Area under the curve is 0.96 for both in-line PET/CT and software fusion of PET and CT. TPR = true-positive rate; FPR = false-positive rate.
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