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出 处:《肿瘤研究与临床》2014年第9期624-625,共2页Cancer Research and Clinic
摘 要:目的 探讨激光定位系统对盆腔肿瘤患者放疗体位重复性的影响.方法 选取40例盆腔肿瘤患者分别利用激光定位系统进行摆位(20例)和不利用激光定位系统进行摆位(20例),并用锥形束CT(CBCT)在线验证,分析摆位误差情况.结果 利用激光定位系统摆位误差在X、Y、Z轴上分别为(2.63±1.07) mm、(2.38±1.28) mm、(2.46±1.21) mm;未利用激光定位系统摆位误差在X、Y、Z轴上分别为(3.04±1.22) mm、(2.55±1.35) mm、(3.09±1.37) mm.两者相比,X、Z轴方向线性摆位误差差异有统计学意义(P值分别为0.040、0.003),Y轴上差异无统计学意义(P=0.432).结论 利用激光定位系统对改进型腹板患者进行摆位,能有效提高精确放疗患者治疗中体位的重复性.Objective To investigate influence of laser positioning system to position repeatability of patients treated with radiotherapy for pelvic tumors.Methods Forty patients with pelvic tumors were divided into two groups,using laser positioning system positioning (20 cases) and conventional positioning (20 cases),respectively,CBCT was used to verify and analyze the setup errors of two groups.Results The setup errors on X,Y and Z axes in laser positioning system positioning group were (2.63±1.07) mm,(2.38±1.28) mm and (2.46±1.21) mm,they were (3.04±1.22) mm,(2.55±1.35) mm and (3.09±1.37) mm in conventional positioning group.It has significance reduce on X and Z axes (P =0.040,0.003,respectively) by using laser positioning system,and has no significance on Y axis (P =0.432).Conclusion It can improve patient positioning repeatability effectively by using laser positioning system for patient positioning.
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