主动呼吸控制与自由呼吸配合bodyfix固定装置用于胸部肿瘤SBRT对比研究

doi:10.3760/cma.j.cn113030-20201212-00613

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Abstract Objective To compare the difference between active breathing coordinator (ABC) technique and free breathing (FB) mode combined with bodyfix stereotactic radiotherapy (SBRT) for chest tumors. Methods 40 thoracic tumor patients receiving SBRT were randomly selected and divided into the ABC technique group and FB model group. After fixation with bodyfix fixing devices in two groups, cone-beam CT (CBCT) scan images before each SBRT were matched with the plan reference images. The setup errors in the left-right (LR), superior-inferior (SI) and anterior-post (AP) directions were obtained. Then, the setup errors were corrected. SBRT was performed and split intra-fraction CBCT was conducted simultaneously, which was repeated until the end of treatment. Results In the ABC technique group, the setup errors in the LR, SI and AP directions were (0.25±0.21) cm,(0.28±0.21) cm, and (0.21±0.24) cm, significantly less compared with (0.31±0.22) cm,(0.32±0.21) cm and (0.37±0.23) cm in the FB model group (all P<0.05). The V30Gy of the heart, the V20Gy and V30Gy of the lung in the ABC technique group were significantly less than those in the FB model group (0.31%∶7.35%;24.5%∶32.9%;19.5%∶25.8%, all P<0.05). Conclusions ABC technique combined with bodyfix fixation device may be superior to FB mode in SBRT for chest tumors, which remains to be validated by subsequent studies with large samples.

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	Ying Wei
	Zhang Dekang

Key words： Active breathing coordinator Free breathing Bodyfix fixation device Setup error

Received: 12 December 2020

Cite this article:

Ying Wei,Zhang Dekang. Preliminary comparative study of active breathing coordinator and free breathing combined with bodyfix fixation device in stereotactic radiotherapy of thoracic tumors[J]. Chinese Journal of Radiation Oncology, 2021, 30(7): 717-720.

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http://journal12.magtechjournal.com/Jweb_fszlx/EN/10.3760/cma.j.cn113030-20201212-00613 OR http://journal12.magtechjournal.com/Jweb_fszlx/EN/Y2021/V30/I7/717

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