Electromagnetic wave propagation speed based biological tissue electromagnetic parameter imaging device and method
A technology of biological tissue and electromagnetic parameters, which is applied in the directions of sensors, medical science, diagnostic recording/measurement, etc., and can solve problems such as difficulty in accurately measuring propagation time and short propagation time of electromagnetic field
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[0065] Electromagnetic waves can penetrate the surface of living organisms and propagate inside them. According to the wave theory, when a wave propagates in a biological tissue, its propagation law is closely related to the wavelength of the wave in the biological tissue, and it attenuates as the wave energy is absorbed by the medium during propagation. Generally, if the wavelength is much larger than the size of biological tissue, the wave can be physically approximated as quasi-static.
[0066] When electromagnetic waves propagate in biological tissues, their wavelength has a great relationship with the electromagnetic properties of each tissue. The relevant electromagnetic parameters mainly include: electrical conductivity, dielectric constant and magnetic permeability. Among them, the magnetic permeability of biological tissue is very similar to the magnetic permeability in vacuum, so it has no imaging value. Both the electrical conductivity and the dielectric constant ...
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