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Table 3 Local residual tumor based on MRI (radiologist), PET (nuclear physician), and PET-MRI (consensus radiologist and nuclear physician) scores and change of opinion and policy

From: Positron emission tomography-magnetic resonance imaging (PET-MRI) for response assessment after radiation therapy of cervical carcinoma: a pilot study

Patient MRI local PET local MRI-PET local Change of opinion (reason) Policy of change
1 TN TN TN
2 TN TN TN
3 TN Equivocal TN + PET artifact + Follow-up
4 FP FP Equivocal + No PET uptake at suspicious MRI lesion + Additional imaging
5 FN TP FN + FDG uptake artifact at PET-MR − Metastasis
6 TP TP TP
7 FP TN Equivocal + Consensus + MRI, non-suspicious PET + Additional imaging
8 Equivocal TN FP + Consensus PET-MR, PET hard to interpret due to low-FDG glucose uptake + Salvage surgery
9 Equivocal TP TP + MR partial volume, clear FDG uptake + Salvage surgery
10 TN FP TN + PET hotspot outside cervical tissue − Metastasis
  1. Abbreviation: TN true negative, TP true positive, FP false positive, FN false negative, + positive, − negative