Anisotropy functions for 125I and 103Pd sources.

Anisotropy functions for 125I and 103Pd sources.
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125I 和 103Pd 源的各向异性函数。

DOI:
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发表时间:
1998
期刊:
Medical Physics (Lancaster)
影响因子:
--
通讯作者:
K. Weaver
K. Weaver
中科院分区:
--
文献类型:
--
作者:
K. Weaver

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AAPM第43工作组在最近的一份报告中定义了各向异性函数,并提供了参考数据。然而,一些数据似乎有很大的实验误差。在这项工作中,各向异性函数的三个低能量光子发射源通常用于近距离放射治疗:125 I源模型6702和6711,和模型200 103 Pd源。这些数据是通过两步过程产生的:从空气中测量确定源的固有辐射发射模式,并将这些数据用作水中注量分布的蒙特卡罗计算的输入。碘的新各向异性函数值与二极管测量的早期数据比较良好,并且似乎比TG 43提供的一些数据在物理上更真实。以前用TLD测量的钯数据变化更大,但平均而言与此处提供的数据相似。新数据估计的不确定性为3%-6%;这种准确度水平完全适合临床计算。
The anisotropy function was defined by AAPM Task Group 43 in a recent report, and reference data were provided. However, some of the data appeared to have large experimental errors. In this work, anisotropy functions are presented for three low-energy photon-emitting sources commonly used for brachytherapy: 125I source models 6702 and 6711, and the model 200 103Pd source. The data were generated via a two-step process: the sources' intrinsic radiation emission pattern was determined from in-air measurements, and these data were used as input to Monte Carlo calculations of the fluence distribution in water. The new anisotropy function values for iodine compare well with earlier data from diode measurements, and seem more physically realistic than some data provided by TG43. Previous palladium data measured with TLDs are more variable, but on the average are similar to the data presented here. The new data have estimated uncertainties of 3%-6%; this level of accuracy should be completely adequate for clinical calculations.
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DOI: 10.1016/0360-3016(87)90302-6
发表时间: 1987
期刊: International journal of radiation oncology, biology, physics
影响因子: --
作者:
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发表时间: 1985
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影响因子: 3.8
作者:
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影响因子: --
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DOI: 10.1118/1.596692
发表时间: 1991
期刊: Medical physics
影响因子: 3.8
作者:
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通讯作者: Anderson,LL