| 胸部肿瘤调强放疗中摆位误差的原因与控制 |
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| 引用本文： | 上官小玲,张强克,徐建国.胸部肿瘤调强放疗中摆位误差的原因与控制[J].中国医学物理学杂志,2011,28(4):2716-2717,2732. |
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| 作者姓名： | 上官小玲 张强克 徐建国 |
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| 作者单位： | 浙江省肿瘤医院,浙江杭州,310022 |
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| 摘 要： | 目的:测定胸部肿瘤在调强放射治疗中的摆位偏差,分析计划设计中从临床靶区到计划靶区的外扩边界。方法:随机抽取115名胸部肿瘤患者,在治疗时用电子射野影像装置拍摄射野片,将射野片和计划系统中的数字重建射野图像片进行误差比较。结果:在左右、头脚、腹背方向的摆位误差分别是(-0.46±0.24)cm,(-0.37±0.08)cm,(-0.42±0.19)cm,外扩边界分别是0.7 cm,0.45 cm,0.61 cm。结论:对于胸部调强放疗的患者,CTV到PTV的外放边界在左右方向需要2.5 mm,头脚方向和腹背方向需要2 mm。
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| 关 键 词： | 胸部肿瘤 摆位误差 电子射野影像装置 数字重建图像 |
Set-up Error Analysis and Quality Control of Chest Tumor Cases With IMRT |
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| SHANGGUAN Xiao-ling,ZHANG Qiang-ke,XU Jian-guo.Set-up Error Analysis and Quality Control of Chest Tumor Cases With IMRT[J].Chinese Journal of Medical Physics,2011,28(4):2716-2717,2732. |
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| Authors: | SHANGGUAN Xiao-ling ZHANG Qiang-ke XU Jian-guo |
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| Institution: | SHANGGUAN Xiao-ling,ZHANG Qiang-ke,XU Jian-guo(Department of Radiation Oncology,Zhejiang Provincial Cancer Hospital,Hangzhou Zhejiang 310022,China) |
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| Abstract: | Objective: To measure set-up error of chest cases in intensity modulated radiation therapy(IMRT).The results can be used to determine the margin from clinical target volume(CTV) to planning target volume(PTV) in treatment planning.Methods: 115 chest tumor cases were randomly chosen,each of them was checked with electronic portal imaging device(EPID).These images were compared with digital reconstructed radiography(DRR) which were generated from treatment planning system.Results: The set-up error in left-rig... |
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| Keywords: | chest tumor set-up error EPID DRR |
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