Atomic collision physics relevant to the treatment planning system for heavy particle cancer therapy; Radial dose simulations

重粒子線がん治療の治療計画に関わる原子衝突物理; 動径線量シミュレーション

森林 健悟

Moribayashi, Kengo

Radial dose has been employed in the treatment planning system for heavy particle cancer therapy in order to estimate the cell survival after the exposure to a heavy particle. The two models for radial dose have been available. However, both of these two models have very roughly treated the region near the trajectory of an incident heavy particle, although this region is very important to estimate the biological effect. There are no studies involving the detailed examination of the physical phenomena that occur near the trajectory of an incident ion before ours. The progresses of atomic collision physics and computers allow us to obtain radial dose closer to reality. We may succeed to the point that our model sufficiently reproduces the trend allowing us to select the better one between the two conventional models according to incident ion energies automatically. We think that our simulation model is the only way to analyze physical phenomena near the trajectory of an incident ion in detail at present.