【摘要】 目的:探讨和总结使用Aperture-based逆向计划完成鼻咽癌调强计划设计,所能达到的计划质量及计划设计经验。方法:使用医科达Precise计划系统对24例鼻咽癌进行调强计划设计,每个计划设计9个大野,PGTV、PCTV1和PCTV2的处方剂量分别为68￣70、60和54 Gy。结果:PGTV和PCTV1 95%以上体积达到处方剂量。脑干、脊髓、左右晶体和左右腮腺的最大量平均分别为55、41、6.1和34.8 Gy。结论:使用Aperture-based完成的根治性鼻咽癌调强计划,其计划质量符合临床要求,但对于套环型靶区,在PGTV与PCTV1之间的剂量梯度未能压缩得很好。更多还原

【Abstract】 Objective To evaluate and summarize a design of backward IMRT plan for nasopharyngeal carcinoma with Aperture-based plan.Methods The IMRT plan was designed with ELEKTA Precise plan system based on 24 cases.Each plan had 9 fields shapes.The recipe dose of PGTV,PCTV1 and PCTV2 are 68-70,60 and 54Gy.Results 95% volume of PGTV and PCTV1 reach the recipe dose.The maximum average of brain stem,spinal cord,left and right crystalloid and parotid are 55,41,6.1 and 34.8Gy respectively.Conclusion The IMRT plan by Aperture-based for nasopharyngeal carcinoma is in accordance with the clinical demands.But toward the lantern ring target,the dose grads are not very well between PGTV and PCTV1.更多还原