The value of hypotonia in predisposal of gastric cancer CT : a comparison study

FU Jia; TANG Lei; SUN Yanxia; LI Xiaoting; GAO Shuyu; SUN Yingshi

Abstract：Objective To investigate the values of hypotonic procedures in the CT imaging of gastric cancer.Methods Fiftytwo consecutive gastric cancer patients who underwent hypotonic CT examinations and 52 consecutive patients with non-hypotonic procedure were enrolled in study.The extension degrees of various parts of gastric wall on CT were evaluated with blind method.The thickness of normal gastric wall was measured on axial plane.The appearance of peristaltic wave was observed with combination of axial,coronal and sagittal planes.The subjective image scoring was evaluated through the combination of several imaging quality parameters.Chi-square test,t-test and Kolmogorov-Smirnov test were used to determine the difference between two groups.Results The ratio of thickness larger than 5 mm in normal gastric wall in non-hypotonic group was higher than that of hypotonic group(P ＜ 0.0 0 1).The peristaltic wave displayed more frequently and severe in non-hypotonic group than in hypotonic group (P =0.001).The hypotonic group outperformed non-hypotonic group in subjective image scoring (P ＜ 0.001).Conclusion Hypotonia is a key procedure of gastric cancer CT examination,with which to slow stomach empty,to minimize the tension of gastric wall,to reduce peristaltic wave,to get sufficient distention of gastric wall,and to facilitate the detection of lesions and border judgment.