放疗调强计划不同分野数的三维验证比较

Compare the Three-dimensional Verification Results With Different Technologies During the Instensity-modulated Radiation Therapy

目的：探讨放疗调强计划不同分野数的三维验证比较。方法临床选择2013年5月-2015年12月本院收治的鼻咽癌调强放疗患者50例，然后分别按多分野技术和混合固定铅门技术制定调强计划，并分别应用Compass实测验证两种技术的调强计划进行比较，对各感兴趣区域予以三维空间体积的Gamma分析。结果当设定Gamma误差条件为（3 mm/3%）时，全部靶区和危及器官的通过率在混合固定铅门技术时的通过率较高，均大于95%；而多分野技术全部靶区的通过率则为90%，危及器官的通过率在多分野技术的调强计划通过率稍高为92%。混合固定铅门计划的三维验证结果高于多分野计划，差异有统计学意义（P＜0.05）。结论鼻咽癌调强放疗进行混合固定铅门技术，可满足其靶区和危及器官的临床的质量控制要求。

Objective To compare the three-dimensional verification results with different technologies during the instensity-modulated radiation therapy. Methods50 patients with nasopharyngeal carcinoma treated from May 2013 to December 2015 in our hospital were selected. Based on the SFT and FJT,the corresponding therapy was conducted. Through compass measurements,gamma analysis was conducted in the three-dimensional space. Results With the error condition of gamma was 3 mm/3%,the passing rate of al the target regions and organ at risk based on FJT was the highest（〉95%）,at the same time,the passing rate of al the target regions based on SFT was 90%,the passing rate of organ at risk based on SFT was 92%,the verification result based on FJT was better than SFT（P〈0.05）.Conclusion During the intensity-modulated radiation therapy,the FJT can meet the clinical requirements for target regions and organ at risk.