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Geographic Distribution of CT, MRI and PET Devices in Japan: A Longitudinal Analysis Based on National Census Data

https://hiroshima.repo.nii.ac.jp/records/2007957
https://hiroshima.repo.nii.ac.jp/records/2007957
d225c4da-796e-499b-97d9-5d865afc368c
名前 / ファイル ライセンス アクション
PLoSONE_10_e0126036.pdf PLoSONE_10_e0126036.pdf (1.7 MB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Geographic Distribution of CT, MRI and PET Devices in Japan: A Longitudinal Analysis Based on National Census Data
言語 en
作成者 Matsumoto, Masatoshi

× Matsumoto, Masatoshi

en Matsumoto, Masatoshi

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Koike, Soichi

× Koike, Soichi

en Koike, Soichi

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Kashima, Saori

× Kashima, Saori

en Kashima, Saori

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Awai, Kazuo

× Awai, Kazuo

en Awai, Kazuo

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
権利情報 © 2015 Matsumoto et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
内容記述
内容記述 Background Japan has the most CT and MRI scanners per unit population in the world; however, the geographic distribution of these technologies is currently unknown. Moreover, nothing is known of the cause-effect relationship between the number of diagnostic imaging devices and their geographic distribution. Methods Data on the number of CT, MRI and PET devices and that of their utilizations in all 1829 municipalities of Japan was generated, based on the Static Survey of Medical Institutions conducted by the government. The inter-municipality equity of the number of devices or utilizations was evaluated with Gini coefficient. Results Between 2005 and 2011, the number of CT, MRI and PET devices in Japan increased by 47% (8789 to 12945), 19% (5034 to 5990) and 70% (274 to 466), respectively. Gini coefficient of the number of devices was largest for PET and smallest for CT (p for PET-MRI difference <0.001; MRI-CT difference <0.001). For all three modalities, Gini coefficient steadily decreased (p for 2011-2005 difference: <0.001 for CT; 0.003 for MRI; and <0.001 for PET). The number of devices in old models (single-detector CT, MRI<1.5 tesla, and conventional PET) decreased, while that in new models (multi-detector CT, MRI1.5 tesla, and PET-CT) increased. Gini coefficient of the old models increased or remained unchanged (increase rate of 9%, 3%, and -1%; p for 2011-2008 difference <0.001, 0.072, and 0.562, respectively), while Gini coefficient of the new models decreased (-10%, -9%, and -10%; p for 2011-2008 difference <0.001, <0.001, and <0.001 respectively). Similar results were observed in terms of utilizations. Conclusions The more abundant a modality, the more equal the modality’s distribution. Any increase in the modality made its distribution more equal. The geographic distribution of the diagnostic imaging technology in Japan appears to be affected by spatial competition derived from a market force.
言語 en
内容記述
内容記述タイプ Other
内容記述 This study was supported by Health and Labour Sciences Research Grants of the Ministry of Health, Labour and Welfare, Tokyo, Japan (H25 - Research on Region Medical - 006).
出版者
出版者 Public Library of Science
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
識別子タイプ DOI
関連識別子 10.1371/journal.pone.0126036
関連情報
識別子タイプ PMID
関連識別子 25946125
関連情報
識別子タイプ DOI
関連識別子 https://doi.org/10.1371/journal.pone.0126036
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 1932-6203
開始ページ
開始ページ e0126036
書誌情報 PLoS ONE
PLoS ONE

巻 10, 号 5, p. e0126036, 発行日 2015-05-06
旧ID 48626
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