胃癌是我国常见的恶性肿瘤。据宁波市1967～1971年间回顾性调查分析,胃癌死亡率平均每年为48.49/10万人口,占恶性肿瘤死亡率中的第一位(39.8%)。由于胃癌早期不易发现,从而延误诊治,致使预后不良。虽然X线钡餐造影有助于胃癌的诊断,但是仍不能满足临床的需要,更难以应用到胃癌的普查工作中去,所以寻找一种简 Gastric cancer is a common malignancy in China. According to a retrospective survey conducted in Ningbo City from 1967 to 1971, the average mortality of gastric cancer was 48.49 per 100 000 people per year, which accounted for the first (39.8%) of malignant tumor mortality. As the early stage of gastric cancer is difficult to detect, the diagnosis and treatment are delayed, resulting in poor prognosis. Although X-ray barium meal imaging is helpful for the diagnosis of gastric cancer, it still cannot meet the clinical needs and it is even more difficult to apply it to the census work of gastric cancer.