【摘要】 大剂量后装治疗的优点毋庸赘述。主要治疗子宫颈癌,但迄今某些头颈部、皮肤、阴茎,直肠等肿瘤,尤其是鼻咽癌（NPC）均成为治疗的重要对象。 后装治疗的方法有经口及经鼻腔两种,各有其适应症,本文用463居里钴⁶⁰珠经鼻腔治疗36例,均能很好耐受,治疗是安全的,对复发病例给外照射4000—4500CGy（肿瘤量）及腔内放疗800—1000毫克小时镭当量,分成2—3次给予。 由于选择的计算点不同,虽然剂量相同但治疗时间相差10倍以上,所以应该像子宫颈癌的A、B点一样,在鼻咽部定出一公认的剂量计算点,否则剂量用“毫克小时镭当量”表示比用“CGY”更有意义。更多还原

【Abstract】 The high-dose rate after-loading intracavitary radiation therapy is suitable mainly for the treatment of cervix cancer. So far some cancers of head and neck, skin, penis, rectum ect., especially MPC have become also important indications.There are two ways to insert radiation source to the nasopharyngeal cavity, one through mouth and another through nasal cavity. Each method has its own indications. Using 4.63ci Cobalt 60 ball, we have treated 36 cases with the applicator of nasal cavity. All of these cases have accepted well. The treatment is safety. For reccurent ceses, telecobalt therapy of 4000-4500 cGy, and intracavitary radiation of 800-1000mg-hrs Ra by 2-3 times were used.Due to the different calculation point used, although the given dose is similar, the treatment time has a great difference of even 10 times more. It is better to find out a generally accepted calculation point for NPC like the A, B point for cervix cancer. Otherwise cal-cueated dose with "mg-hrs Ra" is better then with "CGy" .更多还原