Kaiser Andreas, Moser Lutz, Kuschke Wolf, Hinkelbein Margit, Buchali André, Budach Volker
Department of Radiotherapy, Campus Mitte, Charité-Universitätsmedizin Berlin, Germany.
Strahlenther Onkol. 2004 Oct;180(10):637-41. doi: 10.1007/s00066-004-1275-5.
In CT-based adjuvant radiotherapy of the breast, virtual simulation techniques have been developed. This paper demonstrates a simple virtual simulation of a boost field.
41 fields were planned virtually, 26 as electron beams, 15 as tangential photon beams.
Depending on the user's expertise the geometric accuracy was high; possible sources of error are illustrated. Resulting field sizes tended to be slightly larger compared to conventional simulation when applying the same rules of field definition. Differences in focus-skin distances with consecutive divergence effects as well as partial volume effects were discussed to be causal.
Virtual simulation of a boost field has the potential to elegantly link the simplicity of a conventional simulation with the accurate tumor bed identification provided by a CT data set. It was shown to be feasible and favorable with regard to the patient, the medical staff, and the simulator time. Moreover, it offers a visualization of dose distributions, which was found helpful in some cases.
在基于CT的乳腺癌辅助放疗中，已开发出虚拟模拟技术。本文展示了一种简单的瘤床补量野虚拟模拟。
虚拟规划了41个射野，其中26个为电子束射野，15个为切线光子束射野。
根据使用者的专业水平，几何精度较高；文中说明了可能的误差来源。当应用相同的射野定义规则时，与传统模拟相比，所得射野尺寸往往略大。讨论了连续发散效应以及部分容积效应导致的焦点-皮肤距离差异。
瘤床补量野的虚拟模拟有可能将传统模拟的简单性与CT数据集提供的精确肿瘤床识别完美地联系起来。结果表明，这对患者、医护人员和模拟时间而言是可行且有利的。此外，它还提供了剂量分布的可视化，在某些情况下很有帮助。
