目的 探讨胸段食管癌根治术后纵隔转移灶三维适形放射治疗的意义和效果.方法回顾性分析63例食管癌根治术后3~20个月发生纵隔转移患者.转移灶直径<2 cm 10例,2~3 cm33例,>3 cm 20例.伴有颈淋巴结转移9例.63例中右上纵隔27例,左上纵隔16例,中上纵隔20例.63例中未接受过放射治疗的52例先常规分割放射治疗40 Gy,后重新定位再次做治疗计划,新计划3.0 Gy/次,5次/周
Volcanic rocks from the northern and middle Okinawa Trough were dated by ura- nium-series dating method. Differential fractions using magnetic procedure were de