Measuring and testing – Vibration – By mechanical waves
Patent
1989-07-24
1990-10-16
Chapman, John
Measuring and testing
Vibration
By mechanical waves
12866101, G01N 2900
Patent
active
049626671
ABSTRACT:
In an ultrasonic imaging apparatus utilizing an array type ultrasonic probe having a number of arrayed probe elements, high frequency pulse signals subject to different delays are supplied to respective probe elements so as to generate an acoustic beam which converges to a predetermined focal point. When receiving a reflection acoustic beam resulting from the converging beam, a plurality of signal lines extending from respective probe elements are connected in common to set up a plurality of element groups each having a plurality of adjacently arrayed elements and respective signals derived from respective element groups are differently delayed and added together to generate a reception signal representative of a reception beam having a predetermined focal point.
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Ichikawa Noriyoshi
Ikeda Hiroshi
Katakura Kageyoshi
Kondo Shin-ich
Kuriyama Kinji
Chapman John
Hitachi , Ltd.
Hitachi Medical Corporation
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