Ultrasonic diagnostic equipment

Details Ultrasonic diagnostic equipment Ultrasonic diagnostic equipment

1981-02-05

1983-07-12

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

128660, G01N 2900

Patent

active

043923798

ABSTRACT:
In an ultrasonic diagnostic equipment which irradiates a subject with ultrasonic waves and receives reflected waves responsive thereto so as to provide a tomogram of the subject on the basis of the received signals, two tap-changing type phased arrays having different focal sections are alternately operated during a period of the reception of the reflected waves, and while one of the phased arrays is being operated, the tap changing of the other phased array for altering the focal section is made. In spite of reduced numbers of high-class switches and phased arrays used, spike noise due to the changes-over of switches during the dynamic focusing are prevented.

REFERENCES:
patent: 4218768 (1980-08-01), Hassler
patent: 4257271 (1981-03-01), Glenn

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