Arrays of quasi-randomly distributed ultrasound transducers
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United States of America Patent
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Dec 3, 2002
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app pub date -
Jan 4, 2002
filing date -
Feb 19, 1999
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Abstract
An ultrasound transducer array suitable for medical uses such as tissue ablation and short duration high intensity hyperthermia has a plurality of ultrasound transducer elements dispersed across a substrate surface for focusing ultrasound energy over a predetermined focal volume. Particularly optimal results are obtained where the elements are dispersed over the substrate surface in a quasi-random distribution, where the total radiating area of the elements occupying between approximately 40 and 70 % of the total array area, and the frequency of operation of the ultrasound elements and the average diameter of the elements are related according to the expression: d=A.times.c/f.
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