Twelve of all the 14 cases were diagnosed correctively by conventional abdominal sonography and sonography after oral water ingestion.The corrective rate was 85.7%.

• 通过常规腹部超声及饮水后超声检查，12例十二指肠肿瘤获得了正确的观察定位诊断，超声诊断正确率为85.；7%25(12/14）。