Preoperative prediction of perineural invasion of rectal cancer based on a magnetic resonance imaging radiomics model: A dual-center study

Figure 5 Calibration curves of the clinical model, T2-weighted imaging + Contrast-enhanced T1WI fusion sequence radiomics model and clinical-radiomics prediction model. Diagonal lines serve as reference lines, representing the most suitable model. The clinical-radiomics prediction model shows optimal calibration. A: Calibration curves in the training group; B: Calibration curves in the internal validation group; C: Calibration curves in the external validation group. CR: Clinical-radiomics prediction model; T2WI: T2-weighted imaging; T1CE: Contrast-enhanced T1WI.