Ultrasonic imaging apparatus

Details Ultrasonic imaging apparatus Ultrasonic imaging apparatus

1989-06-19

1991-12-17

Jaworski, Francis

Surgery

Truss

Pad

73620, 73625, A61B 800

Patent

active

050727354

ABSTRACT:
An ultrasonic imaging apparatus comprises an ultrasonic transducer for propagating ultrasonic beams to a subject, and converting echo beams reflected from the subject into an echo signal, a focus switch circuit for setting a plurality of focal depths, and a focus control circuit for outputting delay signals corresponding to the focal depths set by the focus switch circuit. The focus control circuit changes the delay signals corresponding to the preset focus depths to signals corresponding to the focus depths that are located within a display range, especially when the ultrasonic image is enlarged and shifted with at least one of the preset focus depths out of the display range.

REFERENCES:
patent: 4528854 (1985-07-01), Shimazaki
patent: 4534221 (1985-08-01), Fife et al.
patent: 4773425 (1988-09-01), Saitou
patent: 4873985 (1989-10-01), Nakajima
patent: 4915115 (1990-04-01), Okazaki et al.
patent: 4962667 (1990-10-01), Ogawa et al.

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