Surgery – Truss – Pad
Patent
1988-10-13
1989-07-25
Jaworski, Francis
Surgery
Truss
Pad
12866206, A61B 800
Patent
active
048503630
ABSTRACT:
First and second ultrasonic transducers having the same resonance frequency are provided at the distal end portion of an endoscope. Ultrasonic lenses having different focal lengths are mounted on first and second transducers, respectively. First and second transducers are rotated around the axis of the insertion portion and mechanically radial-scan an object to be examined. A controller supplies timing signals for driving the transducers in response to the radial-scan to a diagnostic device. The diagnostic device supplies drive pulses synchronized with the timing signals to either of first and second transducers. Ultrasonic echo signals received by first and second transducers are converted into reception signals and input to the diagnostic device. The diagnostic device synthesizes only those signals among the reception signals falling within predetermined distance ranges including focal points to form a tomographic image of the object.
REFERENCES:
patent: 4102204 (1978-07-01), Kretz
patent: 4161121 (1979-07-01), Zitelli et al.
patent: 4233988 (1980-11-01), Dick et al.
patent: 4315435 (1982-02-01), Proudian
patent: 4374525 (1983-02-01), Baba
patent: 4466443 (1984-08-01), Utsugi
patent: 4541435 (1985-09-01), Saito et al.
patent: 4693120 (1987-09-01), Robinson
Jaworski Francis
Manuel George
Olympus Optical Co,. Ltd.
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