Japanese structure survey of radiation oncology in 2009 with special reference to designated cancer care hospitals.
BACKGROUND
The structure of radiation oncology in designated cancer care hospitals in Japan was surveyed in terms of equipment, personnel, patient load, and geographic distribution, and compared with the structure in other radiotherapy facilities and the previous survey.


METHODS
The Japanese Society for Therapeutic Radiology and Oncology surveyed the national structure of radiation oncology in 2009. The structures of 365 designated cancer care hospitals and 335 other radiotherapy facilities were compared.


RESULTS
Designated cancer care hospitals accounted for 50.0% of all the radiotherapy facilities in Japan. The patterns of equipment and personnel in designated cancer care hospitals and the other radiotherapy facilities were, respectively, as follows: linear accelerators per facility: 1.4 and 1.0; dual-energy function: 78.6 and 61.3%; three-dimensional conformal radiotherapy function: 88.5 and 70.0%; intensity-modulated radiotherapy function: 51.6 and 25.3%; annual number of patients per linear accelerator: 301.3 and 185.2; Ir-192 remote-controlled after-loading systems: 31.8 and 4.2%; and average number of full-time equivalent radiation oncologists per facility: 1.8 and 0.8. Compared with the previous survey, the ownership ratio of equipment and personnel improved in both designated cancer care hospitals and the other radiotherapy facilities. Annual patient loads per full-time equivalent radiation oncologist in the designated cancer care hospitals and the other radiotherapy facilities were 225.5 and 247.6, respectively. These values exceeded the standard guidelines level of 200.


CONCLUSIONS
The structure of radiation oncology in designated Japanese cancer care hospitals was more mature than that in the other radiotherapy facilities. There is still a shortage of personnel. The serious understaffing problem in radiation oncology should be corrected in the future.
Department of Medical Physics and Engineering, Osaka University Graduate School of Medicine, 1-7, Yamadaoka, Suita, Osaka, 565-0871, Japan.
Hodaka
H
Numasaki
Masamichi
M
Nishio
Hiroshi
H
Ikeda
Kenji
K
Sekiguchi
Norihiko
N
Kamikonya
Masahiko
M
Koizumi
Masao
M
Tago
Yutaka
Y
Ando
Nobuhiro
N
Tsukamoto
Atsuro
A
Terahara
Katsumasa
K
Nakamura
Tetsuo
T
Nishimura
Masao
M
Murakami
Mitsuhiro
M
Takahashi
Teruki
T
Teshima
D002173:Cancer Care Facilities; D019538:Health Care Surveys; D006761:Hospitals; D006801:Humans; D007564:Japan; D009369:Neoplasms / Q000473:pathology / Q000532:radiotherapy*; D018787:Radiation Oncology; D050397:Radiotherapy, Intensity-Modulated / Q000379:methods