Method and apparatus for synthetic transmit aperture imaging

Details Method and apparatus for synthetic transmit aperture imaging Method and apparatus for synthetic transmit aperture imaging

1998-09-29

1999-09-14

Jaworski, Francis J.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

600443, A61B 800

Patent

active

059514795

ABSTRACT:
An ultrasound imaging system uses a synthetic transmit aperture method with prefocused subapertures. The transmit aperture is divided into several subapertures. Transmission is done sequentially on each subaperture while receiving on the full aperture. The received data sets are then combined using the appropriate delays. In this way the focusing performance of a composite focusing system using a number of focal zones equal to the square of the number of subapertures is achieved. The gain is an increase in the frame rate which is also equal to the number of subapertures used.

REFERENCES:
patent: 4553437 (1985-11-01), Luthra et al.
patent: 4604697 (1986-08-01), Luthra et al.
patent: 5329929 (1994-07-01), Sato et al.
patent: 5779641 (1998-07-01), Hatfield et al.
Holm et al., "Improved framerate with synthetic transmit aperture imaging using prefocused subapertures," IEEE Ultrasonics Symposium, Toronto, Oct. 1997, pp. 1-4.

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