CT Perfusion in the Characterisation of Renal Lesions: An Added Value to Multiphasic CT
Table 4
ROC analysis.
(a) ROC analysis using difference between normal cortex and tumoural PS values
Oncocytomas versus MHLs
Oncocytomas versus all MLs
Area under ROC curve
0.85 (C.I. 0.59–1)
0.85 (C.I. 0.60–1)
Threshold value(s)
NC PS-tumour PS >2.5
NC PS-tumour PS >2.5
Sensitivity
100%
100%
Specificity
66.67%
66.67%
Accuracy
94.87%
95.92%
(b) ROC analysis using absolute enhancement in corticomedullary phase
Oncocytomas versus MHLs
Oncocytomas versus all MLs
Area under ROC curve
0.79 (C.I. 0.61–0.96)
0.83 (C.I. 0.69–0.97)
Threshold value(s)
<160
<160
Sensitivity
93.94%
95.35%
Specificity
50%
50%
Accuracy
87.18%
89.80%
Results of ROC curve analysis in predicting RCCs in relation to oncocytomas using difference in PS values and absolute enhancement in corticomedullary phase. PS: permeability surface; MHLs: malignant hypervascular lesions; MLs: malignant lesions; NC PS: normal cortex permeability surface.
