Smith S R, Foster K R
Phys Med Biol. 1985 Sep;30(9):965-73. doi: 10.1088/0031-9155/30/9/008.
The dielectric properties of two low-water-content tissues, bone marrow and adipose tissue, were measured from 1 kHz to 1 GHz. From 1 kHz to 13 MHz, the measurements were performed using a parallel-plate capacitor method. From 10 MHz to 1 GHz, a reflection coefficient technique using an open-ended coaxial transmission line was employed. The tissue water contents ranged from 1 to almost 70% by weight. The dielectric properties correlate well with the values predicted by mixture theory. Comparison with previous results from high-water-content tissues suggests that bone marrow and adipose tissues contain less motionally altered water per unit dry volume than do the previously studied tissues with lower lipid fractions. The high degree of structural heterogeneity of these tissues was reflected in the large scatter of the data, a source of uncertainty that should be considered in practical applications of the present data.
测量了两种低含水量组织（骨髓和脂肪组织）在1千赫兹至1吉赫兹范围内的介电特性。在1千赫兹至13兆赫兹范围内，使用平行板电容器法进行测量。在10兆赫兹至1吉赫兹范围内，采用了使用开放式同轴传输线的反射系数技术。组织含水量按重量计在1%至近70%之间。介电特性与混合理论预测的值相关性良好。与先前高含水量组织的结果相比表明，骨髓和脂肪组织每单位干体积中运动状态改变的水比先前研究的脂质含量较低的组织要少。这些组织高度的结构异质性反映在数据的较大离散性上，这是在本数据的实际应用中应考虑的一个不确定性来源。
