Ultrasonic imaging apparatus

Details Ultrasonic imaging apparatus Ultrasonic imaging apparatus

1992-03-06

1993-04-20

Kamm, William E.

Surgery

Truss

Pad

12866007, 12866101, 73597, 73625, A61B 812

Patent

active

052033368

ABSTRACT:
An ultrasonic imaging apparatus for obtaining a tomogram image of an object to be diagnosed on a monitor is provided. The apparatus includes electroacoustic transducers, a phasing unit, a phase detection unit, a reference signal generating unit, and an adding unit. Electroacoustic transducers are provided in a lie along a surface of the object, emit ultrasonic waves to the object, detect the ultrasonic waves reflected therefrom, and convert them to electric signals as detection signals; a phasing unit is operatively connected to the electroacoustic transducers for receiving the detection signals, delaying them in accordance with distance between the electroacoustic transducers and the object, and phasing them to match the phase of detection signals. In addition, a phase detection unit is operatively connected to the electroacoustic transducers and a phasing unit for detecting the error of phase contained in the detection signals output from the electroacoustic transducers or the phasing unit, wherein the amount of delay previously set in the phase unit is corrected in accordance with the error; a reference signal generating unit is operatively connected to the phase detection unit for supplying a reference signal having the same frequency as that of the detection signal thereto; and an adding unit is operatively connected to the phasing unit to accumulate the detection signals phased by the phasing unit.

REFERENCES:
patent: 4830015 (1989-05-01), Okazaki
patent: 5113866 (1992-05-01), Hassler et al.

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