Abstract
For irradiation, a rectangular cone for electron beams was newly designed to utilize scattered electrons. A blind tube had a hole placed on the lateral wall and a metal plate placed at the end of tube set at an oblique angle to incident electron beams. We investigated the possible application of this cone for electron beam therapy through the Monte Carlo simulation and experiment. The results show tendency agreement on the dose distribution at the surface of a water phantom and also the depth dose distribution. The maximum output of scattered electrons was about 0.41 Gy/min with the maximum input 6.3 Gy/min. We adjusted the dose distributions for the treatment of intra cavity or the shallow lesion with a configuration scattering plate angle. Therefore, it is expected that the scattered electrons produced by the novel cone can be applied as a new treatment beam.
