{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T21:06:31Z","timestamp":1770843991480,"version":"3.50.1"},"reference-count":31,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2023,4,5]],"date-time":"2023-04-05T00:00:00Z","timestamp":1680652800000},"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":[[2023,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The errors on the stopping power ratio (SPR) of mouthpiece samples from ERKODENT were evaluated. Erkoflex and Erkoloc\u2010pro from ERKODENT and samples that combined Erkoflex and Erkoloc\u2010pro were computed tomography (CT)\u2010scanned using head and neck (HN) protocol at the East Japan Heavy Ion Center (EJHIC), and the values were averaged to obtain the CT number. The integral depth dose of the Bragg curve with and without these samples was measured for 292.1, 180.9, and 118.8 MeV\/u of the carbon\u2010ion pencil beam using an ionization chamber with concentric electrodes at the horizontal port of the EJHIC. The average value of the water equivalent length (WEL) of each sample was obtained from the difference between the range of the Bragg curve and the thickness of the sample. To calculate the difference between the theoretical and measured values, the theoretical CT number and SPR value of the sample were calculated using the stoichiometric calibration method. Compared with the Hounsfield unit (HU)\u2010SPR calibration curve used at the EJHIC, the SPR error on each measured and theoretical value was calculated. The WEL value of the mouthpiece sample had an error of approximately 3.5% in the HU\u2010SPR calibration curve. From this error, it was evaluated that for a mouthpiece with a thickness of 10\u00a0mm, a beam range error of approximately 0.4\u00a0mm can occur, and for a mouthpiece with a thickness of 30\u00a0mm, a beam range error of approximately 1\u00a0mm can occur. For a beam passing through the mouthpiece in HN treatment, it would be practical to consider a mouthpiece margin of 1\u00a0mm to avoid beam range errors if ions pass through the mouthpiece.<\/jats:p>","DOI":"10.1002\/acm2.13987","type":"journal-article","created":{"date-parts":[[2023,4,5]],"date-time":"2023-04-05T15:43:56Z","timestamp":1680709436000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Error on the stopping power ratio of ERKODENT's mouthpiece for head and neck carbon ion radiotherapy treatment"],"prefix":"10.1002","volume":"24","author":[{"given":"Sung Hyun","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Heavy Particle Medical Science, Graduate School of Medical Science Yamagata University  Iidanishi Yamagata Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takayuki","family":"Kanai","sequence":"additional","affiliation":[{"name":"Department of Heavy Particle Medical Science, Graduate School of Medical Science Yamagata University  Iidanishi Yamagata Japan"},{"name":"Department of Radiation Oncology Tokyo Women's Medical University  Shinjuku Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hikaru","family":"Souda","sequence":"additional","affiliation":[{"name":"Department of Heavy Particle Medical Science, Graduate School of Medical Science Yamagata University  Iidanishi Yamagata Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuya","family":"Miyasaka","sequence":"additional","affiliation":[{"name":"Department of Heavy Particle Medical Science, Graduate School of Medical Science Yamagata University  Iidanishi Yamagata Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongbo","family":"Chai","sequence":"additional","affiliation":[{"name":"Department of Heavy Particle Medical Science, Graduate School of Medical Science Yamagata University  Iidanishi Yamagata Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takuya","family":"Ono","sequence":"additional","affiliation":[{"name":"Department of Heavy Particle Medical Science, Graduate School of Medical Science Yamagata University  Iidanishi Yamagata Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshifumi","family":"Yamazawa","sequence":"additional","affiliation":[{"name":"Department of Heavy Particle Medical Science, Graduate School of Medical Science Yamagata University  Iidanishi Yamagata Japan"},{"name":"Department of Radiology Yamagata University Hospital  Iidanishi Yamagata Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koji","family":"Suzuki","sequence":"additional","affiliation":[{"name":"Department of Radiology Yamagata University Hospital  Iidanishi Yamagata Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Azusa","family":"Sato","sequence":"additional","affiliation":[{"name":"Accelerator Engineering Corporation  Inage Chiba Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masashi","family":"Katsumata","sequence":"additional","affiliation":[{"name":"Accelerator Engineering Corporation  Inage Chiba Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takeo","family":"Iwai","sequence":"additional","affiliation":[{"name":"Department of Heavy Particle Medical Science, Graduate School of Medical Science Yamagata University  Iidanishi Yamagata Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,4,5]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/41\/1\/009"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/48\/8\/307"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.meddos.2009.05.004"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/57\/11\/R99"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12194-013-0208-3"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.3390\/s21041215"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.phro.2017.07.003"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13014-019-1289-x"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12194-021-00643-1"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00327253"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/0370-1573(81)90014-4"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/59\/1\/83"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/61\/20\/N542"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1080\/14786440509463378"},{"key":"e_1_2_9_16_1","first-page":"28","volume-title":"Techniques for Nuclear and Particle Physics Experiments\u2014A How\u2010to Approach","author":"Leo WR","year":"2012"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/59\/14\/3737"},{"key":"e_1_2_9_18_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/51\/9\/N01"},{"key":"e_1_2_9_19_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/61\/13\/5037"},{"key":"e_1_2_9_20_1","doi-asserted-by":"publisher","DOI":"10.1088\/1674-1137\/40\/10\/100001"},{"key":"e_1_2_9_21_1","doi-asserted-by":"publisher","DOI":"10.1118\/1.4860256"},{"key":"e_1_2_9_22_1","doi-asserted-by":"publisher","DOI":"10.1088\/1361-6560\/aaa453"},{"key":"e_1_2_9_23_1","doi-asserted-by":"publisher","DOI":"10.1002\/acm2.12465"},{"key":"e_1_2_9_24_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12194-012-0194-x"},{"key":"e_1_2_9_25_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0360-3016(98)00544-6"},{"key":"e_1_2_9_26_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/60\/8\/3271"},{"key":"e_1_2_9_27_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/43\/6\/016"},{"key":"e_1_2_9_28_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/55\/5\/006"},{"key":"e_1_2_9_29_1","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/59\/8\/2059"},{"key":"e_1_2_9_30_1","doi-asserted-by":"publisher","DOI":"10.1002\/mp.14204"},{"key":"e_1_2_9_31_1","doi-asserted-by":"publisher","DOI":"10.1002\/mp.13173"},{"key":"e_1_2_9_32_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.canrad.2020.06.016"}],"container-title":["Journal of Applied Clinical Medical Physics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/aapm.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/acm2.13987","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,8,21]],"date-time":"2023-08-21T03:10:03Z","timestamp":1692587403000},"score":1,"resource":{"primary":{"URL":"https:\/\/aapm.onlinelibrary.wiley.com\/doi\/10.1002\/acm2.13987"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,4,5]]},"references-count":31,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2023,5]]}},"alternative-id":["10.1002\/acm2.13987"],"URL":"https:\/\/doi.org\/10.1002\/acm2.13987","archive":["Portico"],"relation":{},"ISSN":["1526-9914","1526-9914"],"issn-type":[{"value":"1526-9914","type":"print"},{"value":"1526-9914","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,4,5]]},"assertion":[{"value":"2022-11-20","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-03-22","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-04-05","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e13987"}}