Surgery – Truss – Pad
Patent
1982-09-29
1984-09-18
Howell, Kyle L.
Surgery
Truss
Pad
364821, 73602, 73631, G01N 2904, G01N 924, G06G 712
Patent
active
044717857
ABSTRACT:
An ultrasonic imaging system (50) has an array (52) of transducer elements (54-1 through 54-21) for receiving ultrasonic signals reflected from within an inhomogeneous object (16) being examined. The system (50) has a means (80, 84, 88, 94) connected to generate an image in response to the ultrasonic signals. A cross-correlator (70) is connected to compare the signals received by the transducer elements (54-1 through 54-21). An output addressing circuit (130) is connected to inhibit or otherwise modify gain of selected ones of the signals based on the comparison to reduce multipath ultrasonic wave interference, refraction or obstruction image distortion or degradation. A preferred ultrasonic imaging array (52) for this purpose and for time delay image distortion correction has a plurality of segmented, annular transducer elements (54-2 through 54-21). The elements (54-2 through 54-21) are formed as sectors of circles with substantially equal arc lengths. A digital signal processing circuit for the system (50) has a plurality of dual port RAMs (66-1 through 66-21) as delay lines and a cross-correlator (70) including an output addressing circuit (130) controlled by a microcomputer (128). The output addressing circuit (130) generates addresses for output of information from the dual port RAM delay lines (66-1 through 66-21) to accomplish time delay correction and elimination or other gain modification of ultrasonic signals with multipath interference, refraction or obstruction.
REFERENCES:
patent: 3561430 (1971-02-01), Filler
patent: 4317369 (1982-03-01), Johnson
patent: 4395909 (1983-08-01), Steinberg
Burch Donald J.
Buxton James L.
Green Philip S.
Holzemer John F.
Ramsey, Jr. S. David
Faubion Urban H.
Foley Deidre A.
Gregg Edward B.
Higgins Willis E.
Howell Kyle L.
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