Value of Orthogonal Axial MR Images in Preoperative T Staging of Gastric Cancer

To assess the value of orthogonal axial images (OAI) of MRI in gastric cancer T staging. This retrospective study enrolled 133 patients (median age, 63 [range, 24–85] years) with gastric adenocarcinoma who underwent both CT and MRI followed by surgery. MRI lacking or incorporating OAI and CT images were evaluated, respectively. Diagnostic performance (accuracy, sensitivity, and specificity) for each T stage, overall diagnostic accuracy and rates of over- and understaging were quantified employing pathological T stage as a reference standard. The McNemar’s test was performed to compare the overall accuracy. Among patients with pT1–pT4 disease, MRI with OAI (accuracy: 88.7–94.7