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[目的]分析放疗实施过程中肝癌患者肿瘤运动,并为其提供参考。[方法]利用医科达Synergy加速器机载的CBCT,获取5例肝癌患者的连续透视影像,测量患者呼吸运动和肿瘤运动,分析肿瘤运动特点。[结果]通过研究透视影像掌握患者肝部肿瘤运动。自由呼吸时,患者肝部肿瘤运动与呼吸运动表现出高度相关性,5例患者呼吸运动周期为2.2~3.2s,肝部肿瘤在头脚方向的呼吸动度为8~16 mm。[结论 ]通过CBCT透视影像总结了肝癌患者肿瘤运动的特点,为放疗过程中肿瘤运动监测提供了思路。
[Objective] To analyze the tumor movement of patients with liver cancer in the course of radiotherapy and provide references for them. [Methods] The consecutive fluoroscopic images of 5 HCC patients were obtained by using CBCT onboard Synergy Accelerator. Respiratory and tumor activities were measured and the characteristics of tumor movement were analyzed. [Results] Through the study of fluoroscopic imaging in patients with liver tumor movement. Free breathing, the patient’s liver tumor movement and respiratory exercise showed a high degree of correlation, respiratory cycle of 5 patients was 2.2 ~ 3.2s, liver tumor in the direction of the head and feet breathing motion was 8 ~ 16mm. [Conclusion] This paper summarizes the characteristics of tumor movement in patients with liver cancer through CBCT fluoroscopy images, which provides a train of thought for tumor movement monitoring during radiotherapy.