目的 探讨MSCT胃低张充气成像 技术对胃癌进行术前分期诊断的临床应用 价值。方法 前瞻性的对临床诊断为胃癌 的69例患者进行胃低张充气成像及MSCT动 态增强扫描，搜集经手术、病理证实的21 例进行胃低张充气成像患者的手术及病理 资料，对照分析术前CT分期与手术、病 理分期的相关性。结果 胃低张充气成像 法的T分期准确率为80.9%，N分期准确率 为52.4%；回顾性随机抽取20例胃癌患者 进行传统水充盈法CT资料及手术病理资 料，双盲法对其进行术前CT TNM分期，对 照其手术病理分期，结果显示胃水充盈 法的T分期准确率为66.7%，N分期准确率 为50.8%。对比上述结果显示胃低张充气 成像法T分期准确率明显高于传统水充盈 法，N分期准确率无显著提高。结论 MSCT 胃低张充气成像技术对胃癌进行术前分期 诊断中T分期准确率高于传统水充盈法。

Objective To investigate the clinical value of hypotonic air-distended MSCT imaging in the evaluation of preoperative staging diagnosis for gastric cancer. Methods Prospectively studied 69 cases gastric cancer confirmed by clinical diagnosis, these patients were undergone hypotonic air-distended and dynamic contrast-enhanced MSCT scanning before operation. Collected the clinical and pathological dates of 21 cases confirmed by operation, To Analysis the correlation of CT preoperative stage and pathological stage. Results The T staging of hypotonic air-distended MSCT imaging was 80.9%, the N staging was 52.4%. Retrospectively studied the dates of 20 cases by waterdistended MSCT imaging, The T staging of water-distended MSCT imaging was 66.7%, the N staging was 50.8%. The results showed preoperative T staging accuracy rate for gastric cancer by hypotonic air-distended MSCT imaging better than water- distended MSCT imaging, but the preoperative N staging accuracy rate didn't improve significantly. Conclusion The preoperative T staging accuracy rate for gastric cancer by hypotonic airdistended MSCT imaging was better than water- distended MSCT imaging.