THE PROGRESS OF HIMAC AND PARTICLE （HIMAC和粒子的进步）.pdf

THE PROGRESS OF HIMAC AND PARTICLE THERAPY FACILITIES IN JAPAN Satoru Yamada, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan Abstract serious side effects. At present, typical number of fractions is as low as 4 and the treatment can be More than 1,000 patients have been treated with carbon completed within a week for lung and liver cancers. A ions accelerated by a medical synchrotron HIMAC at respiration gated irradiation method with an rf knock out National Institute of Radiological Sciences, NIRS. technique works very effectively for these cases. Figure 1 Treated patients have tumors on sites of head and neck, shows a typical example of carbon ion treatment of a liver lungs, livers, prostates, uteruses, bones and soft tissues, cancer. In the figure, the cancer is indicated with an arrow. etc. The results of the phase I/II clinical studies, the After accumulating numbers of protocols, the carbon purposes of which are to confirm the effectiveness of the therapy at NIRS will change its phase from a free clinical carbon therapy keeping side effects at extremely low trial to a charged treatment within a few years. levels, seem excellent, and a part of the clinical studies have advanced in phase II where the optimum way of treatment are studied. Total of six particle therapy facilities are now in operation or under construction in Japan. Only one of these facilities, NIRS, is designed for carbon or heavier ions. Anothe