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钴—60强辐源被应用于治疗癌症以来,由于对几种癌症有比较好的效果,已成为目前治疗癌症的重要手段之一。根据治疗上的需要,新型更强大的高当量的钴源相继生产出来,用于医疗方面最大当量已达一万数千居里。如何能安全迅速地将一个强钴源从钴源的储运包内推至钴治疗机头内,或在换源时将一个旧钴源拉入储运包内,这是应用钴—60机必须解决的一个问题。虽然自世界各国采用了抽屉式装源方法后,在换源或装新源时受到放射线的损伤已大为减少,但目
Cobalt-60 strong radioactive sources have been used for the treatment of cancer. Because of its relatively good effect on several types of cancer, it has become one of the most important means for the treatment of cancer. According to therapeutic needs, new, more powerful, high-equivalent cobalt sources have been produced in succession, and the maximum medical equivalent has reached 10,000 thousand curies. How to safely and rapidly push a strong cobalt source from a cobalt source storage bag into a cobalt treatment head, or pull an old cobalt source into the storage bag at the time of source change. This is a cobalt-60 machine. One problem that must be solved. Although the use of drawer-loading methods has been adopted in various countries around the world, radiation damage has been greatly reduced when sources are replaced or new sources are installed.