{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T00:32:05Z","timestamp":1777941125404,"version":"3.51.4"},"reference-count":25,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2023,1,1]],"date-time":"2023-01-01T00:00:00Z","timestamp":1672531200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"name":"the Medical Science and Technology Research Fundation of Guangdong Province","award":["No.A2017613"],"award-info":[{"award-number":["No.A2017613"]}]},{"name":"the Medical Science and Technology Research Fundation of Guangdong Province","award":["No.A2020621"],"award-info":[{"award-number":["No.A2020621"]}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Technol Cancer Res Treat"],"published-print":{"date-parts":[[2023,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>To analyze the relationship between the rotational and residual setup errors and the dose deviation on nasopharyngeal carcinoma (NPC) treated by helical tomotherapy (HT).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>From 25 July 2017 to 20 August 2019, 16 treated NPC patients were enrolled in the study. These patients were scanned with full target range megavoltage computed tomography (MVCT) every other day. Adaptive radiotherapy function application software MIM7.1.3 were used to accumulate the actual dose. The dose deviation with the initial plan dose of the patients\u2019 target and organs at risk (OAR) were compared, and the correlation between the dose change and the setup errors (rotational setup errors and neck residual setup error) was analyzed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Translational setup errors increased farther away from the head. Statistically significant difference among 3 groups was achieved in the directions of left-right ( P\u2009&lt;\u2009.001) and anteroposterior ( P\u2009&lt;\u2009.001) by analysis of variance test. Compared with the initial plan dose, the actual accumulated dose of the target area decreased with the actual exposure dose of the OAR increased. However, most of the dosimetric parameters differed by less than 5%. No correlation was found between dose deviation values and the translational setup errors of target. However, sagittal rotational setup errors (pitch) had a positive relationship ( P\u2009&lt;\u2009.05) with the avearge dose of PTVnd (L) ( r\u2009=\u20090.885), PTVnd(R) ( r\u2009=\u20090.547) PTV1( r\u2009=\u20090.633) and PTV2( r\u2009=\u20090.584). Transverse rotational setup errors (roll) had a positive relationship ( P\u2009&lt;\u2009.05) with the avearge dose of PTVnd(R) ( r\u2009=\u20090.593), PTV1( r\u2009=\u20090.505) and PTV2( r\u2009=\u20090.662).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Dose deviation between the actual accumulated and initial plan is not negligible, but most indicators difference is less than 5%, NPC patients treated by HT with MVCT correction setup errors every other day did not need adaptive radiotherapy model unless got rapid tumor shrinkage or weight loss. Moreover, to minimize the dose deviation, more attention should be paid to the reduction of pitch, roll, and residual error of cervical vertebrae during body positioning.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/15330338231169601","type":"journal-article","created":{"date-parts":[[2023,4,20]],"date-time":"2023-04-20T09:45:10Z","timestamp":1681983910000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":7,"title":["Accumulated Dose Deviation of Rotational and Residual Setup Errors on Nasopharyngeal Carcinoma Using MIM Treated by Helical Tomotherapy"],"prefix":"10.1177","volume":"22","author":[{"given":"Wenyan","family":"Yao","sequence":"first","affiliation":[{"name":"Sun Yat-sun University Cancer Center, Guangzhou, P. R. China"},{"name":"State Key Laboratory of Oncology in South China, Guangzhou, P. R. 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China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mengxue","family":"He","sequence":"additional","affiliation":[{"name":"Sun Yat-sun University Cancer Center, Guangzhou, P. R. China"},{"name":"State Key Laboratory of Oncology in South China, Guangzhou, P. R. China"},{"name":"Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yongwen","family":"Fang","sequence":"additional","affiliation":[{"name":"Sun Yat-sun University Cancer Center, Guangzhou, P. R. China"},{"name":"State Key Laboratory of Oncology in South China, Guangzhou, P. R. China"},{"name":"Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mingzhi","family":"Liu","sequence":"additional","affiliation":[{"name":"Sun Yat-sun University Cancer Center, Guangzhou, P. R. 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