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目的:观察在鼻咽癌图像引导放射治疗中采用骨和灰度两种图像匹配模式对摆位误差的影响。方法:在保证客观和尽可能操作规范和标准的条件下,对同一鼻咽癌患者12次治疗重复摆位后用CBCT采集的图像信息,分别采用骨和灰度两种模式与参考图像匹配,观察两种方法对摆位误差的影响。结果:对两种匹配方式的摆位误差分别进行比较,t检验结果显示P值均大于0.05,无统计学意义。结论:鼻咽癌图像引导放射治疗IGRT中采用骨匹配模式进行图像匹配是一种更优选择。
OBJECTIVE: To observe the effect of bone-grayscale matching pattern on image placement error in image-guided radiotherapy of nasopharyngeal carcinoma. Methods: Under the condition of ensuring objective and as much as possible operation norms and standards, the image information collected by CBCT after 12 treatments of the same nasopharyngeal carcinoma patient were placed in the same nasopharyngeal carcinoma patients, Observe the effect of two methods on setting error. Results: Compared with the setup errors of the two matching methods respectively, the t-test results showed that the P values were all greater than 0.05, with no statistical significance. CONCLUSIONS: Image matching using the bone-matching pattern in IGRT guided by nasopharyngeal carcinoma is a better choice.