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FIGURE 4. ROC curves for detection of recurrent CRC on a patient basis. Analysis was based on total study population of 51 patients. According to the reference standard, recurrent CRC (in addition to already known sites in patients referred for tumor staging) was present in 16 patients. Area under the curve is 0.82 for PET and 0.90 for in-line PET/CT (P = 0.09). TPR = true-positive rate; FPR = false-positive rate.
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