二维阵列离子室验证Acuros BV计算的相对剂量分布的可行性研究

Qiang Zhao, Xiangyang Wu, Xiao-long Chang, Tao Feng, Di Yang, Kun Zhang, X. Qu, Xuemin Wang
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引用次数: 0

摘要

目的研究使用PTW729二维阵列离子室验证acros BV算法计算的相对剂量分布的可行性。分析了该方法的优缺点,为临床实践提供参考。方法在自建测量幻影的基础上,在相同的测量条件和计划下,分别用PTW729和薄膜测量幻影同一切片上的剂量分布。用γ分析工具将两种方法得到的剂量分布分别与acros BV计算的结果进行比较。对PTW729的稳定性进行了测试。结果薄膜与acros BV的γ比较值为95.9%,PTW729与acros BV的γ比较值为98.9%,PTW729与acros BV的γ比较值为88.0%,其稳定性测试值分别为95.0%、100.0%和100.0%。结论PTW729二维阵列离子室可用于Acuros BV算法计算的相对剂量分布的快速验证。关键词:二维阵列离子室;Acuros BV;短的治疗
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Feasibility study of using two dimensional array ion-chamber to verifiy relative dose distribution calculated with Acuros BV
Objective To study the feasibility of using the PTW729 2D array ion-chamber to verify the relative dose distribution calculated with the Acuros BV algorithm. Both advantages and disadvantages of the method were analyzed to provide reference for practical clinical practices. Methods Based on self-built measurement phantoms, the dose distribution on the same slice of the phantom was measured with PTW729 and film, respectively, under the same measurement condition and plan. The dose distributions obtained by the two method were compared with the result calculated with Acuros BV, separately, by using γ analytical tool. And the stability of the PTW729 was tested. Results The γ comparison value was 95.9% between the film and Acuros BV, 98.9% between the PTW729 and Acuros BV and 88.0% between the film and PTW729, with 95.0%, 100.0%, and 100.0%, in their stability test respectively. Conclusions PTW729 2D array ion-chamber can be applied to the rapid verification of Acuros BV algorithm-calculated relative dose distribution. Key words: 2D array ion-chamber; Acuros BV; Brachy therapy
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中华放射医学与防护杂志
中华放射医学与防护杂志 Medicine-Radiology, Nuclear Medicine and Imaging
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