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肝癌包括肝细胞癌(Hepatocellular Carcioma,HCC)和肝转移癌,是一种严重危害人类生命和健康的疾病。而适合手术的原发性肝癌不到10％,转移性肝癌不到5％。并且肝癌对通常的放疗和化疗均不敏感。大多数肝癌发现时已很晚,仅有少数患者可手术切除。目前手术仍是主要治疗手段,但是其切除率低于25%,治愈率低于10％。对无手术指征的原发性肝癌、转移性肝癌或伴有肝硬化不宜行肝叶切除者,在目前尚无更有效的治疗方法的情况下,放射治疗是值得选择的治疗手段之一。内照射使用的是放射性同位素,肿瘤区可获得较高的剂量,正常组织受量很小,且肝癌虽然恶性程度较高,有肝静脉系统侵犯的特点,但是其病灶常局限在肝脏,远处转移发生较晚, 这样就为内照射作为局部治疗提供了时机。
Liver cancer, including Hepatocellular Carcinoma (HCC) and metastatic liver cancer, is a disease that seriously endangers human life and health. Less than 10% of primary liver cancer is suitable for surgery, less than 5% of metastatic liver cancer. And liver cancer is not sensitive to the usual radiotherapy and chemotherapy. Most liver cancers are late and only a few patients are resectable. Surgery is still the main treatment, but its resection rate is less than 25% and the cure rate is less than 10%. Radiation therapy is one of the treatment options for primary liver cancer without metastasis, metastatic liver cancer or hepatic resection with cirrhosis. There is no more effective treatment for this condition. Radiation is used within the radioisotope, the tumor area can get a higher dose, the normal tissue by a small amount, and although the higher degree of malignancy of liver cancer has the characteristics of hepatic vein system violations, but the lesions are often confined to the liver, distant The transfer occurred later, which provided an opportunity for internal irradiation as a local treatment.