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Objective To research the image quality of gastric cancer,and the clinical value of Preoperative Staging for Gastric Cancer after Non-Linear Blending in Dual Energy CT.methods Collected the preoperative image of 100 patients who were suspected gastric cancer and examined with enhanced scan between September 2013 and February 2016.All patients were confirmed by pathology of gastroscope or operation.And we tracked the surgical pathological staging.All the scanning parameters were consistent.