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两种不同固定技术在乳腺癌放射治疗中应用比较 被引量:6

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摘要 【摘要】目的比较两种不同固定技术在乳腺癌体外放射治疗中摆位误差,进一步提高精确放射治疗的摆位精度。方法将接受体外放射治疗的64例乳腺癌患者平均分为两组:A组应用乳腺托架固定体位;B组应用乳腺托架+真空垫固定体位。所有患者均在直线加速器的电子射野影像装置(EPID)下拍摄正、侧位射野验证片,与CT模拟定位图像重建的数字化重建图像(DRR)进行比较,得出摆位位移数据。比较各组摆住误差的不同。结果两组各方向摆位误差如下:左右(X轴):(1.309±1.273)mm和(1261±0.014)mm(P〈0.05);头脚(Y轴):(1.926±1.816)mm和(1.636±0.930)mm(P〈0.05);腹背(Z轴):(1.896±1.239)mm和(1.962±1.163)mm(P〉0.05)。结论在定期的EPID验证条件下,采用两种不同固定技术,应用乳腺托架+真空垫的固定技术在左右(X轴)及头脚(Y轴)方向上优于单纯乳腺托架,而腹背(Z轴)方向上差异无统计学意义。
出处 《浙江临床医学》 2016年第5期884-885,共2页 Zhejiang Clinical Medical Journal
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