Ultrasonic transducer materials for medical applications
作者： A. N. Hadjicostis , C. F. Hottinger , J. J. Rosen , P. N. T. Wells
DOI: 10.1080/00150198408017515
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摘要: Abstract Ultrasound has surgical, therapeutic and diagnostic applications in medicine. The highest intensities are used surgery physiotherapy, ceramic transducers with high efficiency narrow bandwidth used. For purposes, short pulses often required, require careful matching to the load. ultrasonic beam is focused by lenses or curved transducers, synthetically means of arrays. PVF2 a promising material because its low characteristic impedance Qm , but improvements coupling coefficient needed dielectric constant Qe pose formidable problems. Other considerations include those electrical, biological acoustical safety.
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