Several experimental campaigns aimed at the dielectric characterization of healthy and malignant tissues, have been proposed over many years. However, disagreements among the results posed a number of questions on accurate knowledge of dielectric properties of biological tissues up to date. The reason for these disagreements are several. We aim to partially address these issues by firstly establishing a rigorous procedure for the measurement of ex-vivo animal and human-derived tissue samples. Then, we investigate the correlation between the dielectric data variability and sample hydration. Measurements were obtained from 0.5 to 50 GHz from liver and kidney cortex of porcine, ovine and bovine animals and one human cadaver. The correlation between the standard deviation of the measurements for each sample and its exact water content is investigated. This enabled the thorough analysis of both the intra- and inter-organ variability together with the intra- and inter-animal variability. Results show that the sample hydration level has a direct influence on the intra- and inter-organ variability, both for homogeneous animal and human tissues.

多年来，已经提出了一些旨在对健康和恶性组织进行介电表征的实验活动。然而，结果之间的分歧对迄今为止对生物组织介电特性的准确了解提出了许多问题。这些分歧的原因有几个。我们的目标是通过首先建立严格的体外动物和人源组织样本测量程序来部分解决这些问题。然后，我们研究介电数据变异性与样品水合作用之间的相关性。在 0.5 至 50 GHz 范围内从猪、绵羊和牛动物的肝脏和肾脏皮质以及一具人类尸体获得测量值。研究了每个样品的测量值的标准偏差与其准确含水量之间的相关性。这使得能够对器官内和器官间的变异性以及动物内和动物间的变异性进行彻底分析。结果表明，样品水合水平对同质动物和人体组织的器官内和器官间变异性有直接影响。