Method and system for coupling acoustic energy using shear waves

Details Method and system for coupling acoustic energy using shear waves Method and system for coupling acoustic energy using shear waves

1996-02-28

1998-02-03

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

12866301, 604 22, A61B 1732

Patent

active

057139164

ABSTRACT:
A system and method for coupling acoustic energy within a waveguide provides highly efficient and sensitive acoustic energy generation and detection. In particular, an ultrasound angioplasty system is described which makes use of an end-fire array of ring transducers to produce highly directionalized sound within an acoustic waveguide. The transducers can be made circularly symmetric, and may be composed of multiple segments for generating sound waves in independent x and y spatial modes within the acoustic waveguide. Each ring transducer is optimally spaced 1/2.lambda..sub.L from its neighbor transducers, such that alternate transducers transduce 180-degrees out of phase, and may have their electrical end inverted for common drive, or for summing of transducer electrical outputs when the array is used as a detector. The phased array may also be used in a resonant acoustic energy system used to detect pressure variations or reflections from a substance, for example, for detecting the progress of chemical reactions, liquid level sensing, etc., imaging, or in various other ultrasound applications.

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