A Preliminary Version of Heavy Ion Treatment Planning System at IMP

Abstract:  Based on the Heavy Ion Research Facility in Lanzhou(HIRFL/HIRFLCSR)， clinical trials of heavy ion radiotherapy are being conducted at the〖HJ*4/9〗 Institute of Modern Physics(IMP)， Chinese Academy of Sciences， where twodimensional(2D) layerstacking conformal irradiation method in a passive beam delivery system was applied. To make better use of the biophysical advantages of heavy ion beams and ensure success of the clinical trials， a preliminary version of heavy ion treatment planning system(TPS) has been developed at IMP. The TPS was designed in a manner to adapt to the 2D layerstacking conformal irradiation method. The architecture and function of the TPS software and the implementation 〖HJ〗of dose calculation algorithm in the TPS were introduced in this paper. The deviation between the doses planned by the TPS and measured through an anthropomorphous phantom was verified to be less than 5%. Finally， the pending issues for developing a sophisticated treatment planning system at IMP were discussed.