胃癌的术中放疗:胃的 X 线诊断技术的新近发展虽使许多胃癌获得了早期切除与较高的生存率,但大多数病人肿瘤仍已侵及肌层与浆膜,并有淋巴结转移。对于局部已有浸润的胃癌,手术疗效并不理想,其主要原因是胃左动脉、肝总动脉及腹腔动脉旁淋巴结转移的发生率高,而彻底清扫这些部位的淋巴结往往是困难的。术中放疗的意义在于提供消灭手术难以清除的残留肿瘤或细胞的可能性。 Intraoperative Radiotherapy for Gastric Cancer: Recent advances in gastric X-ray diagnostic techniques have enabled many patients with gastric cancer to obtain early resection and higher survival rates. However, most patients have invaded the muscularis and serous membranes and have lymph node metastases. For locally invasive gastric cancer, the curative effect is not ideal. The main reason is that the incidence of left gastric artery, common hepatic artery, and celiac para-aortic lymph node metastasis is high, and it is often difficult to thoroughly clean these parts of lymph nodes. The significance of intraoperative radiotherapy is to provide the possibility of eliminating residual tumors or cells that are difficult to remove by surgery.