Impact of Cold Weather on Setup Errors in Radiotherapy

Objective. To investigate the influence of cold weather on setup errors of patients with chest and pelvic disease in radiotherapy. Methods. The image-guided data of the patients were collected from the Radiotherapy Center of Cancer Hospital Affiliated to Guangxi Medical University from October 2020...

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Autores principales:	Shuxue Zhao, Xianfa Lu, Jiasen Zou, Zhouying Xu, Siyu Wei, Liping Li, Qingguo Fu
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Medicine (General) R5-920 Medical technology R855-855.5
Acceso en línea:	https://doaj.org/article/e6f406c8267f40ad97af4be862c01c22
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spelling	oai:doaj.org-article:e6f406c8267f40ad97af4be862c01c222021-11-22T01:11:30ZImpact of Cold Weather on Setup Errors in Radiotherapy2040-230910.1155/2021/1463299https://doaj.org/article/e6f406c8267f40ad97af4be862c01c222021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/1463299https://doaj.org/toc/2040-2309Objective. To investigate the influence of cold weather on setup errors of patients with chest and pelvic disease in radiotherapy. Methods. The image-guided data of the patients were collected from the Radiotherapy Center of Cancer Hospital Affiliated to Guangxi Medical University from October 2020 to February 2021. During this period, the cold weather days were December 15, 16, and 17, 2020, and January 7 and 8, 2021. For body fixation in radiotherapy, an integrated plate and a thermoplastic mold were employed in 18 patients with chest disease, while an integrated plate and a vacuum pad were applied in 19 patients with pelvic disease. All patients underwent cone beam computed tomography (CBCT) scans in the first five treatments and once a week thereafter. The obtained data were registered to the planning CT image to get the setup errors of the patient in the translational direction including X, Y, and Z axes and rotational direction including RX, RY, and RZ. Then, the Mann–Whitney U test was performed. The expansion boundary values of the chest and pelvis were calculated according to the formula MPTV=2.5∑+0.7δ. Results. A total of 286 eligible results of CBCT scans were collected. There were 138 chest CBCT scans, including 26 taken in cold weather and 112 in usual weather, and 148 pelvic CBCT scans, including 33 taken in cold weather and 115 in usual weather. The X-, Y-, and Z-axis translational setup errors of patients with chest disease in the cold weather group were 0.16 (0.06, 0.32) cm, 0.25 (0.17, 0.52) cm, and 0.35 (0.21, 0.47) cm, respectively, and those in the usual weather group were 0.14 (0.08, 0.29) cm, 0.23 (0.13, 0.37) cm, and 0.18 (0.1, 0.35) cm, respectively. The results indicated that there was a statistical difference in the Z-axis translational error between the cold weather group and the usual weather group (U = 935.5; p=0.005<0.05), while there was no statistical difference in the rotational error between the two groups. The external boundary values of X, Y, and Z axes in the cold weather group were 0.57 cm, 0.92 cm, and 0.99 cm, respectively, and those in the usual weather group were 0.57 cm, 0.78 cm, and 0.68 cm, respectively. There was no significant difference in the translational and rotational errors of patients with pelvic disease between the cold weather group and the usual weather group (p<0.05). The external boundary values of X, Y, and Z axes were 0.63 cm, 0.79 cm, and 0.68 cm in the cold weather group and 0.61 cm, 0.79 cm, and 0.61 cm in the usual weather group, respectively. Conclusion. The setup error of patients undergoing radiotherapy with their bodies fixed by an integrated plate and a thermoplastic mold was greater in cold weather than in usual weather, especially in the ventrodorsal direction.Shuxue ZhaoXianfa LuJiasen ZouZhouying XuSiyu WeiLiping LiQingguo FuHindawi LimitedarticleMedicine (General)R5-920Medical technologyR855-855.5ENJournal of Healthcare Engineering, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine (General) R5-920 Medical technology R855-855.5
spellingShingle	Medicine (General) R5-920 Medical technology R855-855.5 Shuxue Zhao Xianfa Lu Jiasen Zou Zhouying Xu Siyu Wei Liping Li Qingguo Fu Impact of Cold Weather on Setup Errors in Radiotherapy
description	Objective. To investigate the influence of cold weather on setup errors of patients with chest and pelvic disease in radiotherapy. Methods. The image-guided data of the patients were collected from the Radiotherapy Center of Cancer Hospital Affiliated to Guangxi Medical University from October 2020 to February 2021. During this period, the cold weather days were December 15, 16, and 17, 2020, and January 7 and 8, 2021. For body fixation in radiotherapy, an integrated plate and a thermoplastic mold were employed in 18 patients with chest disease, while an integrated plate and a vacuum pad were applied in 19 patients with pelvic disease. All patients underwent cone beam computed tomography (CBCT) scans in the first five treatments and once a week thereafter. The obtained data were registered to the planning CT image to get the setup errors of the patient in the translational direction including X, Y, and Z axes and rotational direction including RX, RY, and RZ. Then, the Mann–Whitney U test was performed. The expansion boundary values of the chest and pelvis were calculated according to the formula MPTV=2.5∑+0.7δ. Results. A total of 286 eligible results of CBCT scans were collected. There were 138 chest CBCT scans, including 26 taken in cold weather and 112 in usual weather, and 148 pelvic CBCT scans, including 33 taken in cold weather and 115 in usual weather. The X-, Y-, and Z-axis translational setup errors of patients with chest disease in the cold weather group were 0.16 (0.06, 0.32) cm, 0.25 (0.17, 0.52) cm, and 0.35 (0.21, 0.47) cm, respectively, and those in the usual weather group were 0.14 (0.08, 0.29) cm, 0.23 (0.13, 0.37) cm, and 0.18 (0.1, 0.35) cm, respectively. The results indicated that there was a statistical difference in the Z-axis translational error between the cold weather group and the usual weather group (U = 935.5; p=0.005<0.05), while there was no statistical difference in the rotational error between the two groups. The external boundary values of X, Y, and Z axes in the cold weather group were 0.57 cm, 0.92 cm, and 0.99 cm, respectively, and those in the usual weather group were 0.57 cm, 0.78 cm, and 0.68 cm, respectively. There was no significant difference in the translational and rotational errors of patients with pelvic disease between the cold weather group and the usual weather group (p<0.05). The external boundary values of X, Y, and Z axes were 0.63 cm, 0.79 cm, and 0.68 cm in the cold weather group and 0.61 cm, 0.79 cm, and 0.61 cm in the usual weather group, respectively. Conclusion. The setup error of patients undergoing radiotherapy with their bodies fixed by an integrated plate and a thermoplastic mold was greater in cold weather than in usual weather, especially in the ventrodorsal direction.
format	article
author	Shuxue Zhao Xianfa Lu Jiasen Zou Zhouying Xu Siyu Wei Liping Li Qingguo Fu
author_facet	Shuxue Zhao Xianfa Lu Jiasen Zou Zhouying Xu Siyu Wei Liping Li Qingguo Fu
author_sort	Shuxue Zhao
title	Impact of Cold Weather on Setup Errors in Radiotherapy
title_short	Impact of Cold Weather on Setup Errors in Radiotherapy
title_full	Impact of Cold Weather on Setup Errors in Radiotherapy
title_fullStr	Impact of Cold Weather on Setup Errors in Radiotherapy
title_full_unstemmed	Impact of Cold Weather on Setup Errors in Radiotherapy
title_sort	impact of cold weather on setup errors in radiotherapy
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/e6f406c8267f40ad97af4be862c01c22
work_keys_str_mv	AT shuxuezhao impactofcoldweatheronsetuperrorsinradiotherapy AT xianfalu impactofcoldweatheronsetuperrorsinradiotherapy AT jiasenzou impactofcoldweatheronsetuperrorsinradiotherapy AT zhouyingxu impactofcoldweatheronsetuperrorsinradiotherapy AT siyuwei impactofcoldweatheronsetuperrorsinradiotherapy AT lipingli impactofcoldweatheronsetuperrorsinradiotherapy AT qingguofu impactofcoldweatheronsetuperrorsinradiotherapy
_version_	1718418314510729216

Impact of Cold Weather on Setup Errors in Radiotherapy

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