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- W1990659882 abstract "A theoretical study of the longitudinal vibration response of a bent fiber used as an active element of a medical applicator for Laser Ultrasound Surgical Therapy (LUST) is presented. The fiber cross section (∅300–1000 μm) is much smaller than the longitudinal wavelength (λ=15–20 cm). Wave propagation in the bent fiber is described by the governing second-order equations of motion which neglect the flexure effect. The range of the validity of those equations is discussed. In contrast to numerous works on bent rods, the case of an arbitrary continuous curvative distribution along the fiber is investigated. A simple analytical formula for the transfer function, i.e., the ratio of displacements at the working end of the fiber divided by those at the driven end, is obtained. The transfer function depends on frequency, fiber length, output impedance, loss factor, and the mean-square curvative of the fiber. The behavior of this function is investigated applied to some fibers whose lengths are of the order 1 m. The driven frequency is of about 10–50 kHz. If the displacement at the driven end of the fiber is known, the power output of the applicator can be found from the known values of the tissue impedance and the transfer function." @default.
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- W1990659882 date "1997-08-01" @default.
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- W1990659882 title "The longitudinal vibration response of a curved fiber used for laser ultrasound surgical therapy" @default.
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- W1990659882 doi "https://doi.org/10.1121/1.419937" @default.
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