胃癌是一种严重威胁人们生命的恶性肿瘤,它的发病率很高,居消化道肿瘤第一位。据统计,全国每年约有16万人死于胃癌,病人绝大多数为40～60岁的中老年人。 本世纪初,胃X线钡餐检查开始应用于临床,为诊断胃肠疾病揭开了新的一页。但普通钡餐检查对病变的漏诊率为三分之一,医生们不断地寻觅更佳的诊断方法。1957年, Gastric cancer is a kind of malignant tumor that seriously threatens people’s lives. It has a high incidence rate and ranks first in the gastrointestinal cancer. According to statistics, about 160,000 people die of gastric cancer each year in the country, and most of the patients are middle-aged and old people aged 40 to 60 years. At the beginning of this century, gastric X-ray barium examination began to be applied in clinical practice and opened a new page for diagnosing gastrointestinal diseases. However, the rate of missed diagnosis of common barium meal examinations is one third, and doctors are constantly looking for better diagnostic methods. In 1957,