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Radiomics (PET-CT)
Texture analysis of OAR (model performance)
Van Dijk, et al. Radiother Oncol 2017
Model performance measure
Model
Reference model
(PG dose and BLX)
Reference model
+ P90
Reference model
+ LRHG3E
-2 log-likelihood
184.51
175.30
174.31
Nagelkerke R
2
0.22
0.28
0.29
Area Under the Curve (AUC)
0.73
0.77
0.77
Hosmer-Lemeshow test X
2
(p-
value)
11.22 (0.19)
6.72 (0.57)
6.30 (0.61)
LRHG3E = Long Run High Grey- level Emphasis 3: long repetitions of high SUVs are present in the
parotid gland
P90 = the 90th percentile of SUVs