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  1. Article ; Online: A National Survey on Safety Management at MR Imaging Facilities in Japan.

    Azuma, Minako / Kumamaru, Kanako K / Hirai, Toshinori / Khant, Zaw Aung / Koba, Ritsuko / Ijichi, Shinpei / Jinzaki, Masahiro / Murayama, Sadayuki / Aoki, Shigeki

    Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine

    2020  Volume 20, Issue 4, Page(s) 347–358

    Abstract: Purpose: To investigate safety management at Japanese facilities performing human MRI studies.: Methods: All Japanese facilities performing human MRI studies were invited to participate in a comprehensive survey that evaluated their MRI safety ... ...

    Abstract Purpose: To investigate safety management at Japanese facilities performing human MRI studies.
    Methods: All Japanese facilities performing human MRI studies were invited to participate in a comprehensive survey that evaluated their MRI safety management. The survey used a questionnaire prepared with the cooperation of the Safety Committee of the Japanese Society for Magnetic Resonance in Medicine. The survey addressed items pertaining to the overall MRI safety management, questions on the occurrence of incidents, and questions specific to facility and MRI scanner or examination. The survey covered the period from October 2017 to September 2018. Automated machine learning was used to identify factors associated with major incidents.
    Results: Of 5914 facilities, 2015 (34%) responded to the questionnaire. There was a wide variation in the rate of compliance with MRI safety management items among the participating facilities. Among the facilities responding to this questionnaire, 5% reported major incidents and 27% reported minor incidents related to MRI studies. Most major incidents involved the administration of contrast agents. The most influential factor in major incidents was the total number of MRI studies performed at the facility; this number was significantly correlated with the risk of major incidents (P < 0.0001).
    Conclusion: There were large variations in the safety standards applied at Japanese facilities performing clinical MRI studies. The total number of MRI studies performed at a facility affected the number of major incidents.
    MeSH term(s) Contrast Media ; Humans ; Japan ; Magnetic Resonance Imaging ; Safety Management ; Surveys and Questionnaires
    Chemical Substances Contrast Media
    Language English
    Publishing date 2020-11-26
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2217833-8
    ISSN 1880-2206 ; 1880-2206
    ISSN (online) 1880-2206
    ISSN 1880-2206
    DOI 10.2463/mrms.mp.2020-0084
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Correction to: Global and Japanese regional variations in radiologist potential workload for computed tomography and magnetic resonance imaging examinations.

    Kumamaru, Kanako K / Machitori, Akihiro / Koba, Ritsuko / Ijichi, Shinpei / Nakajima, Yasuo / Aoki, Shigeki

    Japanese journal of radiology

    2018  Volume 36, Issue 4, Page(s) 282–284

    Abstract: In Results of Abstract, the first sentence should read as: The radiologist potential workload in Japan was 2.78-4.17 times higher than those in other countries. ...

    Abstract In Results of Abstract, the first sentence should read as: The radiologist potential workload in Japan was 2.78-4.17 times higher than those in other countries.
    Language English
    Publishing date 2018-03-20
    Publishing country Japan
    Document type Published Erratum
    ZDB-ID 2488907-6
    ISSN 1867-108X ; 1867-1071
    ISSN (online) 1867-108X
    ISSN 1867-1071
    DOI 10.1007/s11604-018-0730-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Global and Japanese regional variations in radiologist potential workload for computed tomography and magnetic resonance imaging examinations.

    Kumamaru, Kanako K / Machitori, Akihiro / Koba, Ritsuko / Ijichi, Shinpei / Nakajima, Yasuo / Aoki, Shigeki

    Japanese journal of radiology

    2018  Volume 36, Issue 4, Page(s) 273–281

    Abstract: Purpose: To investigate the global variation in radiologist potential workload for CT and MRI examinations, and the regional variation in potential workload and extent of radiologists' involvement in CT and MRI examinations in Japan.: Methods: " ... ...

    Abstract Purpose: To investigate the global variation in radiologist potential workload for CT and MRI examinations, and the regional variation in potential workload and extent of radiologists' involvement in CT and MRI examinations in Japan.
    Methods: "Radiologist potential workload" was defined as the annual number of CT plus MRI examinations divided by the total number of diagnostic radiologists. The extent of radiologists' involvement was measured as the proportion of CT and MRI examinations to which "Added-fees for Radiological Managements on Imaging-studies (ARMIs)" were applied among eligible examinations. Maximum variation was computed as the ratio of the highest-to-lowest values among the countries or Japanese prefectures.
    Results: The radiologist potential workload in Japan was 2.78-4.17 times higher than those in other countries. A maximum prefecture-to-prefecture variation was 3.88. The average percentage of CT plus MRI examinations with ARMI applied was 43.3%, with a maximum prefecture-to-prefecture variation of 3.97. Prefectures with more radiologists tended to have a higher extent of radiologists' involvement.
    Conclusions: Japan had a far greater radiologist potential workload compared with other countries, with a large regional variation among prefectures. Prefectures with more radiologists tended to have a higher extent of radiologists' involvement in CT and MRI examinations.
    MeSH term(s) Australia ; Canada ; Databases, Factual ; Europe ; Humans ; Internationality ; Japan ; Korea ; Magnetic Resonance Imaging/statistics & numerical data ; Radiologists/statistics & numerical data ; Radiology ; Tomography, X-Ray Computed/statistics & numerical data ; United States ; Workload/statistics & numerical data
    Language English
    Publishing date 2018-02-16
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2488907-6
    ISSN 1867-108X ; 1867-1071
    ISSN (online) 1867-108X
    ISSN 1867-1071
    DOI 10.1007/s11604-018-0724-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: [Comparison of ERCP and MRCP: invasiveness and cost].

    Fukushima, Tohru / Yamada, Rina / Koba, Ritsuko / Asakura, Takeshi / Osanai, Shiroh / Imamura, Keiko / Nakajima, Yasuo

    Nihon Igaku Hoshasen Gakkai zasshi. Nippon acta radiologica

    2004  Volume 64, Issue 3, Page(s) 93–98

    Abstract: The purpose of this study was to compare ERCP and MRCP in terms of invasiveness and cost. A questionnaire regarding patient satisfaction was distributed to 23 ERCP patients and 63 MRCP patients. The practical cost of each examination and total yearly ... ...

    Abstract The purpose of this study was to compare ERCP and MRCP in terms of invasiveness and cost. A questionnaire regarding patient satisfaction was distributed to 23 ERCP patients and 63 MRCP patients. The practical cost of each examination and total yearly cost for 2002, including medication costs for post-ERCP pancreatitis, were calculated. On a trial basis, the total yearly cost for 2002 was also calculated as a percentage of the cost in 1996. Results of the questionnaire showed that patients tended to favor MRCP over ERCP. In our hospital, the practical costs of MRCP and ERCP were 2063 points and 3964 points, respectively. Medication costs for pancreatitis corresponded to about 3% of the total yearly cost for ERCP. The total yearly costs for both examinations and the medication costs for pancreatitis were about 1,360,000 points. The result of trial calculation with the examination percentage of 1996 was about 1,950,000 points. The results of our study demonstrated that MRCP is a noninvasive examination for patients and that its popularization contributed to a reduction in medical costs. For further popularization of equipment and advanced imaging methods, careful assessment of examination costs is important.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Bile Ducts ; Cholangiopancreatography, Endoscopic Retrograde/economics ; Costs and Cost Analysis ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Pancreas ; Patient Satisfaction
    Language Japanese
    Publishing date 2004-03
    Publishing country Japan
    Document type Comparative Study ; English Abstract ; Journal Article
    ZDB-ID 604105-x
    ISSN 1347-7951 ; 0048-0428
    ISSN (online) 1347-7951
    ISSN 0048-0428
    Database MEDical Literature Analysis and Retrieval System OnLINE

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