@misc{oai:repo.qst.go.jp:00070315,
 author = {Ando, Yutaka and Kamada, Tadashi and Fuwa, Nobukazu and Sakurai, Hideyuki and Ogino, Takashi and Murayama, Shigeyuki and Yamamoto, Kazutaka and Hishikawa, Yoshio and Murakami, Masao and Nakano, Takashi and 安藤 裕 and 鎌田 正 and 櫻井 英幸 and 荻野 尚 and 村山 重行 and 菱川 良夫 and 村上 昌雄 and 中野 隆史},
 month = {Nov},
 note = {Purpose/Objective(s): 
In Japan, we have experienced the particle therapy for more than ten
years. The Japan Clinical Study Group of Particle Therapy (JCPT) studied
the achievements of the Japanese particle therapy from 2002 to 2009. Our
study group covered the all Japanese particle therapy institutions. The
aim of the paper is to disclose the status of the Japanese particle
therapy and to analyze the change of the number of the therapy.
\nMaterials/Methods:
The JCPT member consisted of the eight particle therapy institutions.
Each hospital was (1) Southern Tohoku Proton Therapy Center, (2) Proton
Medical Research Center, University of Tsukuba, (3) Division of
Radiation Oncology, National Cancer Center, (4) Research Center for
Charged Particle Therapy, National Institute of Radiological Sciences,
(5) Proton Therapy Division, Shizuoka Cancer Center Hospital, (6) The
Wakasa Wan Energy Research Center, (7) Hyogo Ion Beam Medical center and
(8) Gunma University. The JCPT office gathered each institution's annual
report and analyzed the number of treatments. Particle therapy was
divided into a proton therapy and a carbon ion therapy. We analyzed the
disease, gender and age distributions.
\nResults:
The number of particle therapy treatment from 2002 to 2009 reached
10,782. Each annual number of particle therapy was 520 (244 proton:p,
276 carbon:c) in 2002, 794 (474 p, 320 c) in 2003, 1082 (699 p, 383 c)
in 2004, 1276 (803 p, 473 c) in 2005, 1453 (827 p, 626 c) in 2006, 1712
(923 p, 789 c) in 2007, 1712 (781 p, 931 c) in 2008, 2233 (1278 p, 955
c) in 2009. The number of patients according to the primary lesion
ranged 198 (164 p, 34 c) for CNS tumors, 1448 (815 p, 633 c) for Head
and Neck tumors, 1241 (742 p, 499 c) for lung tumors, 112 (77 p, 35 c)
for upper digestive organ tumors, 1257 (947 p, 310 c) for liver tumors,
151 (42 p, 109 c) for pancreas tumors, 73 (8 p, 65 c) for gynecological
tumors, 2509 (1770 p, 739 c) for prostate tumors, 659 (118 p, 541 c) for
bone and soft tissue tumors, 246 (44 p, 202 c) for recurrent rectal
tumors and 1275 (438 p, 837 c) for other or unclassified tumors. The
treatment for prostate cancer was a major target. The gender
distribution of the patients treated by the particle therapy was 7933
for male and 2849 for female. The male patients were almost three times
as many as the female patients.
\nConclusions:
This paper reports the activity of Japanese particle therapy for 8
years. We think that the analysis of the particle therapy is very
important for the radiation oncology. We will be able to realize the
desirable co-operation between the JCPT hospitals and establish the
Japanese database concerned with the proton and carbon ion therapy.
This study was supported by Grants-in-Aid for Scientific Research
(2009-Gan Ippan-008) from the Ministry of Health, Labor and Welfare of
Japan., ASTRO　５２nd Annual Meeting},
 title = {How did the particle therapy grow in the Japanese radiation therapy},
 year = {2010}
}