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目的 改进乳腺癌术后锁骨腋窝照射野的技术 ,减少肺部放射性损伤的发生。方法 对乳腺癌术后放射治疗的 5 0例患者锁骨腋窝野下界进行改进 ,并与常规野放射治疗的 111例患者进行对比 ,观察并分析两者对肺损伤的影响。结果 改进后减少肺照射面积 2 2 .49cm2 (t =2 0 .87,P <0 .0 0 1)。减少肺照射体积 5 5 .30cm3 (t=6 5 .37,P <0 .0 0 1) ,肺的放射性损伤显著降低 ,区域淋巴结转移无增加。结论 锁骨腋窝野下界缩小 ,显著降低了肺部放射性损伤并有效控制了区域淋巴结转移
Objective To improve the technique of postoperative radiosurgery of the clavicle in breast cancer and reduce the occurrence of radiation injury in the lung. Methods 50 cases of postoperative radiotherapy for breast cancer were treated with radiotherapy to improve the inferior border of the clavicle, compared with 111 cases of conventional field radiation therapy. The effects of the two methods on lung injury were observed and analyzed. Results After improvement, the area of lung irradiation was reduced by 22.49cm2 (t = 20.87, P < 0.01). By reducing the volume of lung irradiation 5 5 .30cm 3 (t = 6 5 .37, P <0.01), the lung’s radioactive damage was significantly reduced, and regional lymph node metastasis was not increased. Conclusion The lower boundary of the clavicle and popliteal fossa is reduced, which significantly reduces lung radiation damage and effectively controls regional lymph node metastasis.