Huddleston A L, Bhaduri D, Weaver J
Med Phys. 1979 Nov-Dec;6(6):519-22. doi: 10.1118/1.594616.
The determination of the physical density by Compton scatter densitometry is dependent upon the geometry used for the measurement. The diameter of the sample, the density range, and the scattering volume size and shape influence the relative electron density values obtained by such a system. This work presents the results of an experimental analysis of these parameters in which the importance of each is evaluated for samples of known density. A bias in the computed Compton density, due to multiple scattering and attenuation, is defined; and an expression relating the density bias to these geometrical parameters is presented. The importance of applying corrections to the computed physical density for samples of large diameter and/or high density (cortical bone tissue and large diameter cancellous bone tissue) is discussed.
通过康普顿散射密度测定法确定物理密度取决于测量所使用的几何结构。样品的直径、密度范围以及散射体积的大小和形状会影响通过该系统获得的相对电子密度值。本文展示了对这些参数进行实验分析的结果，其中针对已知密度的样品评估了每个参数的重要性。定义了由于多次散射和衰减导致的计算康普顿密度中的偏差，并给出了将密度偏差与这些几何参数相关联的表达式。讨论了对大直径和/或高密度样品（皮质骨组织和大直径松质骨组织）的计算物理密度进行校正的重要性。
