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Positron range and coincidence non-collinearity in SimSET

机译:正电子范围和巧合非相连的血型

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We have modified SimSET to model positron range and annihilation radiation non-collinearity. Positron range in water is sampled using the empirical model developed by Palmer and Brownell [1]. The positron is projected from the decay location in a random direction with adjustment for the density and effective atomic number and weight of intervening tissues. The positron range algorithm was validated by comparing simulated range distributions to the model and with data published by Derenzo [2]. Annihilation non-collinearity is simulated as a Gaussian-distributed variation from 180 degrees with a standard deviation of 0.5 degrees. Tests verify the simulated non-collinearity is Gaussian distributed and that the azimuthal angle is unbiased.
机译:我们已经修改了模拟正电子范围和湮灭辐射非共线性的Simset。使用Palmer和Brownell开发的经验模型对水进行反采样正数范围[1]。正电子从衰减位置沿随机方向投射,调节密度和有效原子数和中间组织的重量。通过将模拟范围分布与模型和Derenzo发布的数据进行比较来验证正电子范围算法[2]。湮灭非共线性被模拟为高斯分布的变化从180度,标准偏差为0.5度。测试验证模拟的非共线性是高斯分布的,并且方位角是无偏见的。

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