乳腺癌胸壁野结合锁骨上野放疗时头部固定的重要性研究

doi:10.3760/cma.j.issn.1004-4221.2018.05.013

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Abstract

Objective To explore the importance of head fixation in chest wall field combined with supraclavicular field radiotherapy for breast cancer by comparing the displacement error and dosimetric differences caused by multi-functional body board and breast bracket. Methods Thirty patients with breast cancer were randomly divided into groups A and B. In group A, patients were fixed with multi-functional body board and head thermoplastic film. In group B, patients were fixed with traditional breast brackets. Each patient received CBCT scan before and after radiotherapy. Both setup errors and intra-fractional displacements in the x-,y-and z-axis, V100 and V95 were calculated. Statistical analyses were performed using the independent sample t-test. Results The displacement errors in groups A and B before and after radiotherapy were (1.24±0.42),(1.71±0.61) and (2.25±1.04) mm vs.(3.67±2.05),(3.78±1.74),(4.65±2.66) mm in the x-,y-and z-axis, respectively (P=0.033,0.027,0.020).The intra-fractional displacements in groups A and B were (1.10±0.66),(1.13±0.59),(1.11±0.62) mm vs.(2.48±0.88),(2.21±0.98),(3.53±2.01) mm in the x-,y-and z-axis, respectively (P=0.030,0.021,0.013).The V100 in groups A and B were (94.27±3.20)% and (99.08±0.60)%(P=0.065),and (89.48±4.70)% and (96.53±2.50)% for V95(P=0.002),respectively. Conclusion The risk of displacement error is significantly reduced using multi-functional body board, which enhances the accuracy of radiation dose in chest wall and supraclavicular fields of breast cancer patients.

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	Articles by authors
	Xie Tao
	Xu Qing
	Peng Jiayuan
	Meng Yiran
	Guan Shikuo
	Yang Zhaozhi
	Mei Xin
	Yu Xiaoli

Key words： Head fixation Multi-functional board Set-up error Breast neoplasm/radiotherapy

Received: 25 December 2017

Corresponding Authors: Xu Qing,Email:qingxu68@hotmail.com

Cite this article:

Xie Tao,Xu Qing,Peng Jiayuan et al. Study of significance of head fixation in the chest wall field combined with supraclavicular field radiotherapy for breast cancer[J]. Chinese Journal of Radiation Oncology, 2018, 27(5): 500-503.

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http://journal12.magtechjournal.com/Jweb_fszlx/EN/10.3760/cma.j.issn.1004-4221.2018.05.013 OR http://journal12.magtechjournal.com/Jweb_fszlx/EN/Y2018/V27/I5/500

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