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钻-60治疗机是肿瘤放射治疗常用的一种远距离治疗设备。其中机头是钻源的贮存和照射部分。从安全防护角度要求源的传动结构要灵活,保证在正常使用过程中不发生放射源松脱或卡在中途不能回到贮存位置等故障。我区第二人民医院使用的旋转式钴-60治疗机曾发生一次卡源故障。卡源产生的主要原因是装放射源的抽屉,管腔变形,抽屉来回运动受到限制,把源卡住。装放射源的抽屉是由推拉器作为传输系统,使它在管腔内移动于照射或关闭位置。但由于传输系统推拉器的拉杆质量问题而突然断裂,致使钴源处
Drilling -60 treatment machine is a commonly used long-distance treatment of tumor radiotherapy equipment. The nose is the storage and exposure part of the drill. From the point of view of safety protection, it is required that the transmission structure of the source should be flexible so as to ensure that no failure occurs during the normal use of the source such as loosening of the radioactive source or the inability to return to the storage location in the middle of the process. Second District People’s Hospital, I used the rotary cobalt-60 treatment machine has a card source failure. Card source is the main reason for the installation of radioactive source drawer, lumen deformation, drawer back and forth movement is limited, the source stuck. The radioactive source drawer is used as a transfer system by the pusher to move it within the lumen to the illuminated or closed position. However, due to transmission system push rod pull rod quality problems suddenly rupture, resulting in cobalt source