Abstract
Clinical trial of the heavy ion radiotherapy at HIMAC was started at June 1994, and we have treated 230 patients using the carbon - ion beam until the end of last February. The treatment system is working with a good stability and the irradiation to the patient is going smoothly, no matter what HIAC is very large and complex system. Here we report the treatment control system and the current irradiating procedure at HIMAC.
