Predictive value of portal venous phase computed tomography parameters for anastomotic stricture after D2 gastrectomy

Figure 1 Receiver operating characteristic curves of computed tomography quantitative parameters for predicting anastomotic stricture after D2 gastrectomy for gastric cancer. It shows the receiver operating characteristic curve performance of four prediction models. The normalized portal vein (PV) computed tomography (CT) value (PV-HU) model demonstrated the best performance [area under the curve (AUC) of 0.812], followed by the splenic vein CT value model (AUC = 0.724), PV-to-abdominal aorta CT value ratio model (AUC = 0.768), and PV-HU model (AUC = 0.697). The points marked on the curves represent the optimal cutoff values for each model. The dashed line represents the reference line (AUC = 0.5), indicating no discriminative ability. All models showed AUC values significantly higher than the reference line, demonstrating good discriminative ability, with the normalized PV-HU model exhibiting the best diagnostic performance. aorta-HU: Abdominal aorta computed tomography value; AUC: Area under the curve; nPV-HU: Normalized portal vein computed tomography value; PV-HU: Portal vein computed tomography value; SV-HU: Splenic vein computed tomography value.