Dynamic array aperture and focus control for ultrasonic imaging

Details Dynamic array aperture and focus control for ultrasonic imaging Dynamic array aperture and focus control for ultrasonic imaging

1977-12-27

1979-12-25

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Acoustic image conversion

73626, 367105, G01S 966

Patent

active

041807901

ABSTRACT:
A B-scan ultrasonic imager such as a single-sector scanner has a dynamic aperture and focus control to attain improved lateral resolution especially at ranges less than the maximum array aperture. As the range from which echoes are being received propagates out, the array aperture during each echo reception period is increased by steps by switching in more elements of the total transducer array. At least one adjustment of receiving channel time delays is made to dynamically focus the echoes at different focal points.

REFERENCES:
patent: 3911730 (1975-10-01), Niklas
patent: 3936791 (1976-02-01), Kossoff
patent: 4012952 (1977-03-01), Dory
patent: 4058003 (1977-11-01), Macovski
Thurston et al., Acoustical Holography, vol. 5, 1974, Plenum Press, N. Y., pp. 249-259.

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