【Klose Liu】評論
Treatment head:• Shielded by lead, tungsten, or lead–tungsten alloy.• Tungsten target (in position for the x-ray mode). Focal spot size ~2 to 3 mm in diameter.• Dual scattering foil (in position for the electron mode). The function of scattering foilis to spread the electron beam as well as make it uniform in cross section.• Flattening filter (in position for the x-ray mode). The function of the flattening filteris to make the x-ray beam intensity uniform across the field.文字出處:Khan 4th P56
【NN】評論
治療機頭:• 由鉛、鎢或鉛鎢合金屏蔽。• 鎢靶(在X 射線模式的位置)。 焦點大小直徑約 2 至 3 毫米。• 雙散射箔(電子模式的位置)。 散射箔的作用是使電子束擴散並使其橫截面均勻。• 扁平濾光片(在X 射線模式的位置)。 扁平濾波器的作用是使 X 射線束強度在整個場中均勻。