Methods: The patients undergoing radiotherapy were postured and the agreement of laser beam mark line before radiotherapy and collimated laser beam line were analyzed.

• 方法:摆完治疗体位放射治疗前,测量治疗室激光定位线与定位时激光线标记的吻合度。结果:在1750人次的测量中,95%25能达到治疗体位的标准,还有5%25需要修正,方可进行治疗。