Kramer Gary H, Hauck Barry M, Dang Shannon, Capello Kevin
Human Monitoring Laboratory, Radiation Surveillance and Health Assessment Division, Radiation Protection Bureau, 775 Brookfield Road, Ottawa, ON, Canada K1A 1C1.
Radiat Prot Dosimetry. 2008;130(4):514-7. doi: 10.1093/rpd/ncn100. Epub 2008 Apr 11.
The sliced Bottle Manikin Absorber (BOMAB) phantom was originally proposed as an alternative to a commercially available phantom, but it suffers from the disadvantage of containing over 160 sources that need to be manufactured; however, it was found that the number of slices could be reduced substantially and that two slices in the sliced phantom gave the same performance characteristics over a wide energy range as a conventional BOMAB phantom for a particular counting system. This work explores the adaptability of this phantom to another counting geometry. The response of the Human Monitoring Laboratory's whole-body counter measuring this phantom with a decreasing number of planar sources has been modelled using MCNP5 over a wide energy range (122-2754 keV). It was found that the best agreement was obtained when the phantom contained 10 sources, 1 in the mid point of each section. As this is a different result from a previous finding, any other counting geometry will have to be assessed to determine the optimum loading if the sliced phantom is to be used. Also, it is clear that this type of phantom cannot be used for an intercomparison that will encounter different counting geometries, unless it contains a full loading of sources.
切片式人体模型吸收器（BOMAB）体模最初被提议作为市售体模的替代品，但它存在一个缺点，即包含超过160个需要制造的源；然而，研究发现切片数量可以大幅减少，并且在特定计数系统的宽能量范围内，切片体模中的两片与传统BOMAB体模具有相同的性能特征。这项工作探索了这种体模对另一种计数几何结构的适应性。使用MCNP5在宽能量范围（122 - 2754 keV）内对人体监测实验室的全身计数器测量该体模（平面源数量逐渐减少）的响应进行了建模。结果发现，当体模包含10个源（每个部分的中点有1个）时，能获得最佳一致性。由于这与之前的发现不同，如果要使用切片体模，必须评估任何其他计数几何结构以确定最佳负载。此外，很明显，除非该体模包含全部负载的源，否则这种类型的体模不能用于会遇到不同计数几何结构的比对。
