{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T03:47:40Z","timestamp":1782445660806,"version":"3.54.5"},"reference-count":27,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2022,8,26]],"date-time":"2022-08-26T00:00:00Z","timestamp":1661472000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["aapm.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Applied Clin Med Phys"],"published-print":{"date-parts":[[2022,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The Task Group 218 (TG\u2010218) report was published by the American Association of Physicists in Medicine in 2018, recommending the appropriate use of gamma index analysis for patient\u2010specific quality assurance (PSQA). The paper demonstrates that PSQA for radiotherapy in Japan appropriately applies the gamma index analysis considering TG\u2010218.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials\/methods<\/jats:title><jats:p>This survey estimated the acceptance state of radiotherapeutic institutes or facilities in Japan for the guideline using a web\u2010based questionnaire. To investigate an appropriate PSQA of the facility\u2010specific conditions, we researched an optimal tolerance or action level for various clinical situations, including different treatment machines, clinical policies, measurement devices, staff or their skills, and patient conditions. The responded data were analyzed using principal component analysis (PCA) and multidimensional scaling (MDS). The PCA focused on factor loading values of the first contribution over 0.5, whereas the MDS focused on mapped distances among data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Responses were obtained from 148 facilities that use intensity\u2010modulated radiation therapy (IMRT), which accounted for 42.8% of the probable IMRT use in Japan. This survey revealed the appropriate application of the following universal criteria for gamma index analysis from the guideline recommendation despite the facility\u2010specific variations (treatment machines\/the number of IMRT cases\/facility attributes\/responded [representative] expertise or staff): (a) 95% pass rate, (b) 3% dose difference and 2\u2010mm distance\u2010to\u2010agreement, and (c) 10% threshold dose. Conditions (a)\u2013(c) were the principal components of the data by the PCA method and were mapped in a similar distance range, which was easily clustered from other gamma index analytic factors by the MDS method. Conditions (a)\u2013(c) were the universally essential factors for the PSQA in Japan.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>We found that the majority of facilities using IMRT in each region of Japan complied with the guideline and conducted PSQA with deliberation under the individual facility\u2010specific conditions.<\/jats:p><\/jats:sec>","DOI":"10.1002\/acm2.13745","type":"journal-article","created":{"date-parts":[[2022,8,26]],"date-time":"2022-08-26T15:49:35Z","timestamp":1661528975000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Assessment of using a gamma index analysis for patient\u2010specific quality assurance in Japan"],"prefix":"10.1002","volume":"23","author":[{"given":"Yusuke","family":"Anetai","sequence":"first","affiliation":[{"name":"Department of Radiology Kansai Medical University  Hirakata\u2010shi Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Iori","family":"Sumida","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology Osaka University Graduate School of Medicine  Suita\u2010shi Osaka Japan"},{"name":"Physics and clinical support Accuray Japan K.K.  Chiyoda\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Kumazaki","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology International Medical Center Saitama Medical University  Hidaka\u2010shi Saitama Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Kito","sequence":"additional","affiliation":[{"name":"Department of Radiotherapy Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital  Bunkyo\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masahiko","family":"Kurooka","sequence":"additional","affiliation":[{"name":"Department of Radiology Tokyo Medical University Hospital  Shinjuku\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshihiro","family":"Ueda","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology Osaka International Cancer Institute  Osaka\u2010shi Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuki","family":"Otani","sequence":"additional","affiliation":[{"name":"Department of Radiology Kaizuka City Hospital  Kaizuka Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuichiro","family":"Narita","sequence":"additional","affiliation":[{"name":"Department of Medical Physics High Precision Radiation Therapy Center Aomori Shintoshi Hospital  Aomori\u2010shi Aomori Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryu","family":"Kawamorita","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology Tane General Hospital  Osaka\u2010shi Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazuhiko","family":"Akita","sequence":"additional","affiliation":[{"name":"Kansai BNCT Medical Center Osaka Medical and Pharmaceutical University  Takatsuki\u2010shi Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takahiro","family":"Kato","sequence":"additional","affiliation":[{"name":"Department of Radiological Sciences School of Health Sciences Fukushima Medical University  Fukushima\u2010shi Fukushima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mitsuhiro","family":"Nakamura","sequence":"additional","affiliation":[{"name":"Division of Medical Physics Department of Information Technology and Medical engineering Human Health Sciences Graduate School of Medicine Kyoto University  Sakyo\u2010ku Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,8,26]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/mp.12810"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1097\/COC.0b013e31826e0515"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.3600524"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1097\/COC.0b013e31826e0515"},{"key":"e_1_2_9_6_1","first-page":"A1","article-title":"Radiation offers new cures, and ways to do harm","volume":"23","author":"Bogdanich W","year":"2010","journal-title":"NY Times"},{"key":"e_1_2_9_7_1","first-page":"15","article-title":"As technology surges, radiation safeguards lag","volume":"23","author":"Bogdanich W","year":"2010","journal-title":"NY Times"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.1598711"},{"key":"e_1_2_9_9_1","volume-title":"A Review of \u201cMethods of Multivariate Analysis\u201d","author":"Rencher AC","year":"2005"},{"key":"e_1_2_9_10_1","unstructured":"Status of Notification of Facility Standards.2021. 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