Zhang Pengpeng, Beddar A Sam, Sibata Claudio H
Department of Radiation Oncology, Columbia University, New York, New York 10032, USA.
Med Phys. 2004 Apr;31(4):755-9. doi: 10.1118/1.1650564.
We present a development of the use of the AAPM TG-43 dose formalism applied to 137Cs gynecological implant sources. The geometry factor, radial dose function, and anisotropy function of a 137Cs source modeled after the Nuclear Associates 67-809 series stainless steel jacketed tube source were derived following the AAPM TG-43 formalism. The dose rate distribution through the center of the source using the AAPM TG-43 dose formalism is calculated and compared with the calculations obtained using the Sievert summation and Monte Carlo simulation. The three methods resulted in an agreement within less than 5%, or an isodose rate line agreement within 2 mm. We demonstrate that the AAPM TG-43 formalism can be applied to 137Cs linear sources and is capable of serving as a 137Cs dose calculation algorithm that can be used for treatment planning purpose.
我们展示了将美国医学物理师协会（AAPM）TG - 43剂量形式体系应用于137铯妇科植入源的相关进展。按照AAPM TG - 43形式体系，推导了以核联合公司67 - 809系列不锈钢护套管源为模型的137铯源的几何因子、径向剂量函数和各向异性函数。使用AAPM TG - 43剂量形式体系计算了通过源中心的剂量率分布，并与使用西弗特求和法和蒙特卡罗模拟得到的计算结果进行比较。这三种方法的结果在小于5%的范围内一致，或者等剂量率线在2毫米范围内一致。我们证明，AAPM TG - 43形式体系可应用于137铯线性源，并且能够作为一种可用于治疗计划目的的137铯剂量计算算法。
