目的　探讨消化道肿瘤低张CT扫描的价值。方法　对 182例消化道肿瘤进行了低张CT扫描 ,胃肿瘤CT扫描用水作对比剂 ;小肠扫描用 1.5 %泛影葡胺作为对比剂 ;结肠扫描用水和泛影葡胺作对比剂。结果　 12 9例胃肿瘤、14例小肠肿瘤和 39例结肠肿瘤的CT扫描均获得了满意的效果。结论　低张CT扫描技术对消化道肿瘤的检查效果良好 Objective To investigate the value of low-resolution CT scanning of gastrointestinal tumors. Methods 182 cases of digestive tract tumors underwent low-resolution CT scan, stomach tumor CT scan water contrast agent; small bowel scan with 1.5% diatrizoate as contrast agent; colon scan with water and diatrizoate as contrast agent. Results The CT scan of 12 9 gastric tumors, 14 small intestinal tumors and 39 colon tumors showed satisfactory results. Conclusions Low-tension CT scan has a good effect on digestive tract tumors