期刊文献+

图像引导放疗技术对提升直肠癌术前调强放疗精度的研究

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摘要 目的:分析图像引导放疗技术(IGRT)在提升直肠癌术前调强放疗(IMRT)中的作用。方法:将2016.01~2018.12我院接收IIIII期直肠癌患者共64例为研究对象,术前均予以IMRT,放疗期间间隔1周开展1次IGRT,得到放疗前与放疗后两组影像于三维空间中对比位置误差,并计算出系统误差与随机误差,依据公式进行计划靶区扩边值(MPTV)计算。结果:368个CBCT图像于X轴位上误差范围在0.85~1.15cm,Y轴位上误差范围在1.95~2.12cm,Z轴位上误差范围在1.88~1.80cm。校正后X、Y、Z轴上平移误差比校正前更小(P<0.05)。校正后,X、Y、Z轴上MPTV依次减少1.35cm、1.55cm、1.35cm。结论:IGRT能使直肠癌患者的术前IMRT系统误差、摆位误差减少,确保精准放疗。
作者 李鑫
出处 《医学食疗与健康》 2020年第6期173-173,175,共2页 Medical Diet and Health
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