全身皮肤电子线照射技术的开发及研究--台湾经验交流

The technique and development of total skin electron irradiation-Taiwan experiences

目的：开发设计躺姿及旋转板电子线全身皮肤肿瘤照射新技术，可使患者从头至脚全身都给到足够且均匀剂量照射。方法躺姿及旋转板电子线照射时直线加速器机头水平往上或水平往下照射，可合成一个可用的剂量剖面野的旋转角度，再求出绝对剂量及 PDD 跟加成因子后就可让患者得到足够且均匀的电子剂量以便做全身性电子线治疗。结果躺姿及旋转板全身电子线照射方式结果显示，采取任一姿式做照射都可在患者治疗表面行成一个平坦的剂量剖面，此剖面剂量均匀度可控制在±10％的范围内。结论躺姿及旋转板电子线照射方式可同时从头至脚在同一次治疗，并得到和全身其余区域相同且均匀的剂量。

Objective The aim of this study is to present two novel technique.Lying on position and rotational board TSEI in which uniform dose to the whole body as well as the soles and vertex of scalp can be achieved in one electron beam treatment fraction. Methods Patients are treated with two groups in prone and supine position by leaning on inner rotational board in prone and supine position, each group can further be separated into two subgroup with tilting and rotation positions for treatment. By incorporating all these setting on the aswirl board with the optimal gantry angle, the patient will final accumulate compensated dosages on whole body surface. Results The dose uniformity for the rotational board.TSET or Lying on position could be control within ±10%. Conclusions The two TSEItechnique.Lying on and Rotational board TSEI techniques presented in this study is able to deliver a uniform dose to the patient’s skin surface as well as to the vertex and the soles all in one time, eliminating the troubles of having to further boost fields for these two regions when using the Stanford Six Field Technique.