Nardi E, Barnea G
Department of Particle Physics, Weizmann Institute of Science, Rehovot, Israel.
Med Phys. 1999 Jun;26(6):967-73. doi: 10.1118/1.598490.
Detailed Monte Carlo electron transport simulations were carried out for the purpose of investigating the possibility of improving electron dose distribution for therapeutic applications, by using transverse magnetic fields. The case studied here is that of a 15 MeV electron beam of 6 cm diameter. The electrons pass through 4 cm of field-free tissue and a transverse magnetic field is applied for depth greater than 4 cm. A field of 3 T was found to improve the skin sparing factor by a factor of 2, when compared to field-free irradiation. A field of 2 T could also have a significant effect although less pronounced than 3 T while, for the case at hand, a magnetic field of only 1 T is not effective. The results here include detailed energy deposition contours in three dimensions.
为了研究通过使用横向磁场改善治疗应用中电子剂量分布的可能性，进行了详细的蒙特卡罗电子输运模拟。这里研究的案例是直径为6 cm的15 MeV电子束。电子穿过4 cm无场组织，对于深度大于4 cm的区域施加横向磁场。与无场照射相比，发现3 T的磁场可将皮肤保护因子提高2倍。2 T的磁场也会有显著影响，尽管不如3 T明显，而对于手头的案例，仅1 T的磁场无效。这里的结果包括三维详细的能量沉积轮廓。
