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20多年前,英国开始试验一种放射性治癌方法。这种方法区别于传统放射性疗法的地方,在于它可使放射源直接触及肿瘤。应用此法必须进行全麻手术,患者手术后要在全密封的空间里住院数日,以防放射性物质向外扩散。这种方法后来在世界上得到推广。随着时间的推移,科学家研制成功一种直径仅1.1毫米、长仅4毫米的徽型放射器,其性能比过去用的放射器高30—50倍。专家们用此放射器通过一个纤维透视导管把射线引进癌变组织,几分钟内它就能释放出过去要用几天才能达到的射线量,治疗过程中需30分钟,根本不用动手术,患者也不用住院。这种新方法原先是为没有住院条件的第三世界国家患者发明的,但很快就在发达
More than 20 years ago, Britain began testing a radioactive cancer treatment. This method differs from conventional radiotherapy in that it allows the radioactive source to reach the tumor directly. Application of this method must be general anesthesia surgery, the patient after surgery in a sealed room for a few days to prevent the spread of radioactive substances outward. This method was later promoted in the world. Over time, scientists have succeeded in developing a 1.1 mm diameter and 4 mm long emblem-type emitter that is 30-50 times more powerful than conventional emitters. Experts use this emitter to introduce radiation into cancerous tissue through a fluoroscopic catheter. Within a matter of minutes, it releases the amount of radiation that it took in the past few days to achieve radiation. The procedure requires 30 minutes without surgery and the patient Do not have to hospital. This new method was originally invented for third-country patients who did not have hospitalization conditions, but soon developed