Brahme A, Hultén G, Svensson H
Phys Med Biol. 1975 Jan;20(1):39-46. doi: 10.1088/0031-9155/20/1/003.
Central axis depth absorbed dose distributions of the electron beam from a medical microtron accelerator have been measured. The measured distributions differ from those of existing betatrons and linear accelerators. A larger absorbed dose build-up and a sharper dose fall-off are obtained in close agreement with theoretical calcuations for monoenergetic electron beams. The differences from other accelerators are explained by the narrow energy spectrum, the clean geometry and the small amount of scattering material in the electron beam of the microtron.
已测量了医用电子回旋加速器电子束的中心轴深度吸收剂量分布。测量得到的分布与现有的电子感应加速器和直线加速器的分布不同。获得了更大的吸收剂量积累和更陡的剂量下降，这与单能电子束的理论计算结果非常吻合。与其他加速器的差异可由电子回旋加速器电子束中的窄能谱、简洁的几何结构和少量散射材料来解释。
