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Variable origin-variable angle acoustic scanning method and apparatus

  • US 5,148,810 A
  • Filed: 07/13/1990
  • Issued: 09/22/1992
  • Est. Priority Date: 02/12/1990
  • Status: Expired due to Term
First Claim
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1. A method for scanning an array of individual transducer elements for obtaining image, velocity or various data from a section of a body comprising the steps ofpropagating acoustic pressure waves into the body from at least one active transmit aperture of individual transducer elements,receiving acoustic echoes on a set of acoustic lines the centers of which are spatially non-overlapping, including the step of steering the angle of each acoustic line relative to the array, using for each line a variable active aperture of individual transducer elements which selectively includes only some or all elements of the array,so that an extension of the acoustic line in space beyond its origin at the array passes through a substantially common vertex which is not located on the transducer array.

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