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Nuclear medicine practice in Japan: a report of the sixth nationwide survey in 2007 |
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| Authors: | Yasuo Kuwabara Kiyoshi Koizumi Yo Ushijima Seigo Kinuya Shigeo Kinomura Kazuyoshi Suga Hiroko Takeoka Tohru Takeda Hiroshi Toyama Yasuo Arao Yoshihiro Nishiyama Kouji Murakami Koichi Morita |
| Affiliation: | 1. Department of Radiology, Fukuoka University Hospital, 7-45-1 Nanakuma, Johnan-ku, Fukuoka, 814-0180, Japan 2. Tokyo Medical University, Tokyo, Japan 3. Matsusita Memorial Hospital, Osaka, Japan 4. Kanazawa University, Kanazawa, Japan 5. Tohoku University, Sendai, Japan 6. Saint Hill Hospital, Ube, Japan 7. Osaka University, Osaka, Japan 8. Tsukuba University, Ibaraki, Japan 9. Fujita Health University, Toyoake, Japan 10. Teikyo University, Tokyo, Japan 11. Kagawa University, Takamatsu, Japan 12. Dokkyo Medical University, Tochigi, Japan 13. Hokkaido University, Hokkaido, Japan |
| Abstract: | Objective The Subcommittee on the Survey of Nuclear Medicine Practice in Japan has performed a nationwide survey of nuclear medicine practice every 5 years since 1982 to provide detailed information on its present status. Methods Questionnaires were sent to all institutions known to the Japan Radioisotope Association to conduct nuclear medicine examinations. The questionnaires addressed the number and kind of nuclear medicine examinations performed as well as the kind and dose of the radiopharmaceuticals used during the month of June 2007. The annual number of total or specific examinations was then estimated. Results Of the institutions sent questionnaires, 1219 were for in vivo study, 49 for in vitro study, and 212 for positron emission tomography (PET) study. Of these, 92.2% provided answers. A total of 1569 gamma cameras were installed in 1119 institutions, of which 70% were dual-head cameras. The estimated total annual number of in vivo examinations expressed by the number of administered radiopharmaceuticals was 1.41 million, representing a decrease of 11.5% when compared with that of the previous survey (2002). The frequency of study with respect to single-photon emission computed tomography (SPECT) slightly increased to 42.3% from 39.9% in the previous survey. The most frequently performed scintigraphy was bone (38.3%), followed by myocardium (26.2%) and brain perfusion (14.1%). Brain perfusion scintigraphy slightly increased, whereas tumor scintigraphy decreased by one-half when compared with the previous survey. The most commonly used radiopharmaceutical for each scintigraphy was 99mTc-HMDP for bone, thallium-201 (201Tl)-chloride for myocardium, gallium-67 (67Ga)-citrate for tumor, and technetium-99m-ethylcysteinate dimmer (99mTc-ECD) for brain. The number of PET institutes increased from 36 to 212. 18F-fluorodeoxyglucose (18F-FDG)-PET dramatically increased 14.8-fold during the past 5 years. Radionuclide therapy also increased. 131I therapy for thyroid cancer and hyperthyroidism was conducted yearly in 2373 and 4146 patients, respectively. A total of 13.1 million in vitro radioassays were carried out yearly, the number of which has been decreasing continuously since 1992. Conclusions It was proved that the content of nuclear medicine practice in Japan has changed considerably in the past 5 years. Namely, 18F-FDG-PET and radionuclide therapy increased. This report might be useful for understanding the present trends of nuclear medicine practice in Japan. |
| Keywords: | In vivo examination In vitro examination Radionuclide therapy PET Nuclear medicine practice |
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