Karlin D L, Konnov B A, Nizkovolos V B, Abrosimov N K, Vorob'ev A A
Med Radiol (Mosk). 1983 Mar;28(3):28-32.
The medical proton beam on the synchrocyclotron in Gatchina modernized in 1980, is characterized by a simplicity of the beam adjustment that amounts to standard operations, the time of adjustment reduced considerably. The optical scheme ensures a good reproducibility of all the beam parameters from session to session. A large "zone of convergence" makes it possible to select a necessary irradiation field size with the diameter from 3 to 10 mm. A new medical complex with a 2-room premises for irradiation is envisaged on the basis of the "second beam" to expand the medical program. The piercing technique of moving field irradiation with protons at an energy of 1 Gy and the utilization of the convergent beam ensure the ratio of the focal dose to the surface dose 200:1.
加特契纳同步回旋加速器上的医用质子束于1980年进行了现代化改造，其特点是束流调节简单，相当于标准操作，调节时间大幅缩短。光学方案确保了各次照射之间所有束流参数的良好重复性。大的“会聚区”使得能够选择直径为3至10毫米的必要照射野尺寸。在“第二束流”的基础上设想建设一个新的医疗设施，有两个用于照射的房间，以扩大医疗项目。能量为1 Gy的质子移动野照射的穿透技术以及会聚束的利用确保了焦点剂量与表面剂量之比为200:1。
