Dielectric properties of body tissues.
Dielectric properties of body tissues.
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DOI：
10.1088/0143-0815/8/4a/002
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发表时间：
1987-01-01
期刊：
影响因子：
--
通讯作者：
Pethig, R
中科院分区：
文献类型：
--
作者：
Pethig, R
综述了哺乳动物组织和生物体液在1 Hz ~ 10 GHz频率范围内的介电特性。所考虑的属性是相对介电常数和电导率的频率变化。已尝试呈现可被认为是每种材料最典型的数据。首先概述了氨基酸、多肽、蛋白质和细胞的水溶液的介电性质，以便为理解组织的性质奠定基础。文中以表格和图形的形式介绍了各种组织和血液的电特性，并讨论了正常组织和癌组织之间的差异。坏死和温度变化的影响进行了描述，并强调了水的整体性能的重要贡献。洞察一些占主导地位的生理和生物物理过程负责的生物材料的介电性能也试图，因为这应该有助于进一步发展的诊断和治疗应用的射频和微波辐射。这些资料也有助于了解这种辐射可能造成的生物危害。介电研究的方式，可以帮助正常和癌组织之间的基本生理差异的分子水平上的理解，以及生物水的物理化学状态，也进行了描述。
A review is given of the dielectric properties of various mammalian tissues and biological fluids for the frequency range from 1 Hz to 10 GHz. The properties considered are the frequency variations of the relative permittivity and electrical conductivity. An attempt has been made to present data which can be considered to be the most typical for each material. The dielectric properties of aqueous solutions of amino-acids, polypeptides, proteins, and then cells, are first outlined in order to lay the groundwork for the understanding of the properties of tissues. The electrical characteristics of various tissues and blood are presented in tabular and graphical form, and the differences between normal and cancerous tissue is also discussed. The effects of necrosis and temperature changes are described and the important contribution that water makes to the overall properties is emphasised. An insight into some of the dominant physiological and biophysical processes responsible for the dielectric properties of biological materials is also attempted, since this should aid further developments of both the diagnostic and therapeutic applications of radiofrequency and microwave radiation. Such information is also relevant to an understanding of the possible biological hazards of such radiation. The ways in which dielectric studies can aid an understanding at the molecular level of the basic physiological differences between normal and cancerous tissue, as well as of the physico-chemical state of biological water, are also described.