Method and apparatus for ultrasonic scanning of an object

Details Method and apparatus for ultrasonic scanning of an object Method and apparatus for ultrasonic scanning of an object

1986-07-11

1988-03-29

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

73628, 128660, G01N 2904

Patent

active

047335629

ABSTRACT:
An ultrasonic array having a number of juxtaposed transducer elements is used for imaging. The reception aperture of the array is divided into individual sub-arrays. Each of these sub-arrays receives, after emission of an ultrasonic signal correlated with it into the object, echo signals reflected therefrom. The echo signals received by the respective sub-array and which are reflected from a common focal point are added up to form a sum signal. For this purpose, at least for some of the transducer elements the delivered output signals are time-delayed according to given patterns. This procedure is repeated for various points along each scan line. The sequentially obtained sum signals are superimposed at each point of the scan line to form a received signal. With this line-oriented method, the same processing channels (time-delays) can be used several times, i.e. successively for each sub-array. This leads to cost-effective production.

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Academic Press, Inc., "Ultrasonic Imaging", 1982, Shattuck et al., pp. 93 to 107.

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