Towards biology-oriented treatment planning in hadrontherapy

Details Towards biology-oriented treatment planning in hadrontherapy Towards biology-oriented treatment planning in hadrontherapy

2005-12-05

arxiv.org/abs/physics/0512029v2

Physics

Biological Physics

Presented to the 14th Symposium on Microdosimetry, November 13-18, 2005, Venezia, Italy; submitted for the proceedings to be p

Scientific paper

By representing damage induction by ionizing particles and its repair by the cell, the probabilistic two-stage model provides a detailed description of the main processes involved in cell killing by radiation. To link this model with issues of interest in hadron radiotherapy, a simple physical model is used. Energy loss, its straggling, and the attenuation of the primary particle fluence are represented in a simplified way, based on semi-phenomenological formulas and energy-loss tables. An effective version of the radiobiological model is joined with the simple physical model to estimate cell survival along ions' penetration depth. The predicted survival ratios for CHO cells irradiated by carbon ions are presented, showing very good agreement with experimental data.

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