Objective To investigate helical CT characteristics of gastric carcinoma,and evaluate the diagnostic value of incremental helical CT for TNM staging of gastric carcinoma.Methods Incremental helical CT scans were performed on 42 patients with gastric carcinoma,given the different oral contrast media,and the result was compared with pathological diagnosis.Results (1)Different oral contrasts varied in showing the details of lesions.And it was proved that water contrasts were the best.(2)The image of the foci became more prominent in all the 42 patients of gastric carcinoma showed significant enhancement in incremental helical CT.(3)The accuracy value of incremental helical CT diagnosing TNM-staging of gastric carcinoma was 88.1%.Conclusion The results reveal that water oral contrast should be administered to diagnose gastric carcinoma by incremental helical CT,and this procedure is of a high diagnostic value to preoperative staging of gastric carcinoma.
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