通过肿瘤放疗计划系统对传统放疗照射野进行探讨，认为原腋锁野适当挡铅可减少肺受照射体积，腋下用填充物能使刑量分布均匀，避免剂量热点 The traditional radiotherapy field was explored through the tumor radiotherapy planning system. It was considered that the original yoke lock field could properly block the volume of lung irradiation and the infraorbital filler could evenly distribute the dose and avoid dose hotspots.