Accurate knowledge of the dielectric properties of biological tissues are crucial for various applications such as assessment of specific absorption rate and safety of electromagnetic medical devices. Most of the availably dielectric data in literature is based on ex-vivo measurements on biological tissue samples obtained from various animal models. This study investigates the differences in the in-vivo and ex-vivo dielectric properties of biological tissues, and variance over several animal species. The dielectric data is obtained from literature and organized to a unified format for comparison. The analysis shows considerable variations not only between in-vivo and ex-vivo dielectric properties of various tissues but also between various animal species.
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