Boyer A L, Fullerton G D, Mira J G
Int J Radiat Oncol Biol Phys. 1982 Nov;8(11):1969-74. doi: 10.1016/0360-3016(82)90457-6.
An electron beam technique has been developed for the treatment of large areas of the chest wall and other curved surfaces employing the stationary field electron beam mode ordinarily available on a linear accelerator. The technique simulates an arc through the use of multiple fixed fields. The electron collimator is not used. Field shaping is achieved through the combined effects produced by the photon jaw settings, the arc limits, and secondary lead shielding on the patient's skin. Thus, there is no limitation on the circumferential extent of the field size that can be used. Electron beam energies of 6 MeV, 9 MeV, 12 MeV, 15 MeV and 18 MeV have been studied. Our findings indicate that, for these energies, this technique produces isodose curves parallel to the cylindrical surface at all depths beyond maximum build-up. This paper discusses the physical characteristics of the single beams, the degree of dose homogeneity achieved with the multiple fields, and the dosimetry technique developed to implement the therapy.
已经开发出一种电子束技术，用于治疗大面积胸壁和其他曲面，该技术采用直线加速器上通常可用的固定场电子束模式。该技术通过使用多个固定野来模拟弧形。不使用电子准直器。通过光子限束器设置、弧形限制和患者皮肤上的二次铅屏蔽所产生的综合效果来实现射野塑形。因此，对于可使用的射野尺寸的圆周范围没有限制。已经研究了6兆电子伏、9兆电子伏、12兆电子伏、15兆电子伏和18兆电子伏的电子束能量。我们的研究结果表明，对于这些能量，该技术在最大剂量建成深度之外的所有深度处都会产生与圆柱表面平行的等剂量曲线。本文讨论了单束射线的物理特性、多野实现的剂量均匀度以及为实施该治疗而开发的剂量测定技术。
