Table 4 Staging and response assessment results of PET/MR compared to PET/CT (reference standard)

Staging (n = 50)

PET/MR

 Concordant

50

 Upstaged

0

 Downstaged

0

 Intermodality agreement (kappa)

1.0 (P = 0)

Interim (n = 20)

 Concordant

18

 Higher Deauville score

0

 Lower Deauville score

2

 Intermodality agreement (kappa)

0.808 (P < 0.001)

End of treatment (n = 20)

 Concordant

20

 Higher Deauville score

0

 Lower Deauville score

0

 Intermodality agreement (kappa)

1.0 (P = 0)