Preoperative perineural invasion in rectal cancer based on deep learning radiomics stacking nomogram: A retrospective study

Figure 5 Receiver operating characteristic curves and calibration curves for training and test set. A: Receiver operating characteristic (ROC) curves of CT_Tstage, arterial support vector machine (ASVM), enous support vector machine (VSVM) and stacking nomogram in the Training set; B: ROC curves of CT_Tstage, ASVM, VSVM and stacking nomogram in the Test set; C: Calibration curves of the stacking nomograms in the training set; D: Calibration curves of the stacking nomograms in the test set. X-axis represents the predicted risk of perineural invasion (PNI). Y-axis represents the actual PNI.