Ultrasonic transducers

Details Ultrasonic transducers Ultrasonic transducers

1979-03-23

1980-10-21

Gill, James J.

Measuring and testing

Vibration

By mechanical waves

73628, 73641, 128663, G01N 2904, A61B 1000

Patent

active

042286875

ABSTRACT:
In a rotating probe ultrasonic system the effective PRF may not be sufficiently high for certain purposes, such as examination of the foetal heart. The invention combines fixed transducers looking at a limited region with a rotating probe scanning over a larger region to give a higher effective PRF in the limited region. The two displays are preferably separate although the display of the larger region may conveniently indicate the location of the limited region.

REFERENCES:
patent: 3403671 (1968-10-01), Flaherty et al.
patent: 4034744 (1977-07-01), Goldberg
patent: 4078435 (1978-03-01), Kossoff et al.
patent: 4143554 (1979-03-01), Nagy et al.

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