一种叫做RT50的接触式x射线治疗机虽然是用于皮肤治疗。但也很适用于腔内辐射,虽然该机已不再生产了,但它的管子还是有价值的。本文介绍的就是一种以RT50管子为基础的接触式x射线治疗机。RT50管工作于50KV峰值、2mA,固定阳极对“按地”灯丝来说处于正电位,x射线反向穿过电子束确保聚焦距离短、固有滤过低,x射线通过固有滤过为0.03mm A contact x-ray machine called RT50 is used for skin treatment. But it is also very suitable for intracavity radiation, although the machine is no longer produced, but its pipe is still valuable. This article describes a RT50 tube-based contact x-ray machine. The RT50 tube operates at 50 kV peak, 2 mA, the fixed anode is at a positive potential for a “ground” filament, the x-rays pass through the electron beam in the reverse direction to ensure short focusing distances and inherent low filtration. The x-rays pass through an inherent filtration of 0.03 mm