Nahid Hajiloo - Radiation Application Research School, Nuclear Science and Technology Research Institute, P.O. Box ۳۱۴۸۵-۴۹۸, Karaj, Iran

In this work, the impact of magnetic field presence on the central axis depth-dose curves of helium ion beams inside a heterogeneous phantom with air and bone layers was investigated. According to the calculations, presence of the magnetic field has a considerable impact on the dose distribution of helium beams depending on the field strength and beam energy. A ۳۲.۳% abrupt increase and ۹۲.۵% reduction in dose were observed at the boundary between the water-air and the water-bone layer insert, respectively. The accuracy of the simulation was evaluated by verifying the depth dose curves of helium ion beams in a water phantom with experimental data.

Dosimetry, Ion-therapy, Helium ions, FLUKA Code, MR-Guided therapy