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提出了一种全新的仰卧位全中枢神经系统放射治疗技术,包括计划、验证和执行.治疗采用2个侧向全颅野加一个背侧的全脊髓野,2侧全颅野采用半野技术,下界共面并垂直于地面;固定全脊髓野一些参数以方便设计及摆位,并且上界与全颅野下界共面.贴一4mm直径的金属小球在衔接处,通过射野摄片确定衔接野的误差.结果显示衔接野误差小于1mm.剂量体积直方图表明在临床靶体积内没有不可接受的剂量热点和冷点.仰卧位全中枢神经系统放射治疗技术方便可靠,完全可以替代传统的俯卧位技术,解决了俯卧位技术无法解决的剂量冷、热点问题.固定射野参数大幅度降低了计划设计的难度,并且有效减少了患者摆位、验证和治疗的时间.
Proposed a new supine total central nervous system radiotherapy technology, including the planning, verification and implementation of the treatment of two lateral total craniofacial plus a dorsal full spinal cord field, two sides of the whole cranial field using half-field technique, The lower bound is coplanar and perpendicular to the ground; some parameters of the whole spinal cord are fixed for convenience of design and placement, and the upper bound is coplanar with the lower bound of the whole cranial field. A 4 mm diameter metal ball is affixed at the junction to be determined by radiography Cohesion field error. The results showed a convergence error of less than 1 mm. The dose-volume histogram showed no unacceptable dose hot spots and cold spots within the clinical target volume. Supine CNS radiotherapy techniques are convenient and reliable and can completely replace the traditional The prone position technique solves the cold and hot issues of dosage that the prone position technique can not solve.The fixed field parameters greatly reduce the difficulty of planning and design, and effectively reduce the time for patient positioning, verification and treatment.