Penetration of THz Radiation in Biological Tissue
Penetration of THz Radiation in Biological Tissue
Terahertz technology has revolutionized many research fields. Much of the research in biomedical applications focuses on radiation-tissue interaction using submillimeter wavelengths in the THz gap range. This technology has a promising future, but good equipment is expensive.
Therefore, this Demonstration investigates a modified bio-heat model equation, which includes the calculation of factors that affect the rate of heat generation per unit volume in tumor cell tissue (). This model analyzes the power effect on the THz radiation penetration in biological tissue by analyzing the scattering, which depends on the angle and wavelength. We study and test our model using THz frequencies and submillimeter wavelengths in the range from 0.1 mm to 30 mm. Because the interaction between THz radiation and tissue involves photon radiation absorption and scattering, the most important parameter is power density (), which is a function of the power delivered by the source and the spot size. In fact, the product of fluence and absorption coefficient equals the heat from the source, which is the amount of energy deposited in a unit volume of tissue.
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