Method of estimating near field aberrating delays

Details Method of estimating near field aberrating delays Method of estimating near field aberrating delays

1991-06-25

1993-12-07

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Acoustic image conversion

367 11, 12866101, G03B 4206

Patent

active

052688763

ABSTRACT:
A method to quantify the distortions caused by near filed variations in the propagation medium of pulse echo imaging systems. By estimating the phase lags induced by the aberrator at each point on the aperture, appropriate electronic delays might be applied to the signals associated with each array element in order to restore the system to focus. The method is capable of estimating the set of aberrating delays in an imaging phased array by using appropriate data from a single two or three dimensional pulse echo scan.

REFERENCES:
Rachlin, "Direct estimation of aberrating delays in pulse-echo imaging systems," J. Acout. Sco. Am. 88 (1), Jul. 1990.

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