【摘要】 目的 探讨不同回声类型超声造影剂在胃肠疾病诊断中的价值。 方法 采用“胃窗声学造影剂”充盈检查法，用凸阵3.5 MHz探头，对2009年3-8月366名受检者行经腹壁超声检查。受检者随机分为两组：饮水者为A组，饮有回声造影剂者为B组。 结果 选择性地应用合适的造影剂，能有效地提高对胃肠疾病的超声诊断水平。【Abstract】 Objective To evaluate the application of contrast agents with different echogenic in the diseases of stomach and intestine. Methods Totally, 366 patients were included in the study from March to August 2009. Patients were randomly divided into two groups： group A (oral acoustic contrast agent) and group B (water). Contrast-enhanced Doppler sonography was performed with 3.5 MHz abdomen probe. Results Contrast agent with anechoic was good for showing iso-echoic and hyperechoic tissue.Hyperechoic contrast agent was better for showing hypoechoic changes according to its long sitting-time in stomach. Conclusion Contrast enhanced ultrasound has practical value in diagnosis of the diseases of stomach and intestine.